Fixed compilation error in the AudioInput demos when MICROPHONE_BIASED_TO_HALF_RAIL is defined (thanks to C. Scott Ananian).

Minor documentation cleanups.

Make sure HID class driver uses properly cast pointers when writing to the report buffer.

Demos/Device/ClassDriver/AudioInput/AudioInput.c

@@ -104,7 +104,7 @@ void ProcessNextSample(void)
 		
 		#if defined(MICROPHONE_BIASED_TO_HALF_RAIL)
 		/* Microphone is biased to half rail voltage, subtract the bias from the sample value */
-		AudioSample -= (SAMPLE_MAX_RANGE / 2));
+		AudioSample -= (SAMPLE_MAX_RANGE / 2);
 		#endif
 
 		Audio_Device_WriteSample16(&Microphone_Audio_Interface, AudioSample);