Fix user-facing and non-user-facing typos

Found via `codespell v2.1.dev0`

examples/pa_fuzz.c

@@ -176,7 +176,7 @@ int main(void)
 
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return -1;

examples/paex_mono_asio_channel_select.c

@@ -160,7 +160,7 @@ int main(void)
     return err;
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;

examples/paex_ocean_shore.c

@@ -526,7 +526,7 @@ int main(void)
 
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return 0;

examples/paex_pink.c

@@ -272,7 +272,7 @@ int main(void)
     return 0;
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return 0;

examples/paex_read_write_wire.c

@@ -197,7 +197,7 @@ error2:
        Pa_CloseStream( stream );
     }
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return -1;

examples/paex_record.c

@@ -344,7 +344,7 @@ done:
         free( data.recordedSamples );
     if( err != paNoError )
     {
-        fprintf( stderr, "An error occured while using the portaudio stream\n" );
+        fprintf( stderr, "An error occurred while using the portaudio stream\n" );
         fprintf( stderr, "Error number: %d\n", err );
         fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
         err = 1;          /* Always return 0 or 1, but no other return codes. */

examples/paex_record_file.c

@@ -448,7 +448,7 @@ done:
         PaUtil_FreeMemory( data.ringBufferData );
     if( err != paNoError )
     {
-        fprintf( stderr, "An error occured while using the portaudio stream\n" );
+        fprintf( stderr, "An error occurred while using the portaudio stream\n" );
         fprintf( stderr, "Error number: %d\n", err );
         fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
         err = 1;          /* Always return 0 or 1, but no other return codes. */

examples/paex_saw.c

@@ -126,7 +126,7 @@ int main(void)
     return err;
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;

examples/paex_sine.c

@@ -168,7 +168,7 @@ int main(void)
     return err;
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;

examples/paex_sine_c++.cpp

@@ -268,7 +268,7 @@ int main(void)
     return paNoError;
 
 error:
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", paInit.result() );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( paInit.result() ) );
     return 1;

examples/paex_wmme_ac3.c

@@ -213,7 +213,7 @@ error:
     Pa_Terminate();
     free( data.buffer );
 
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;

examples/paex_wmme_surround.c

@@ -203,7 +203,7 @@ int main(int argc, char* argv[])
     return err;
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;

examples/paex_write_sine.c

@@ -151,7 +151,7 @@ int main(void)
     return err;
 
 error:
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
 	// Print more information about the error.

examples/paex_write_sine_nonint.c

@@ -160,7 +160,7 @@ int main(void)
     return err;
 error:
     Pa_Terminate();
-    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "An error occurred while using the portaudio stream\n" );
     fprintf( stderr, "Error number: %d\n", err );
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;