Pipe_GetErrorFlags() now returns additional error flags for overflow and underflow errors.

Change MIDI demos to use real MIDI command values, and shift for the USB wrapper, rather than shift for the MIDI bytes. This is a little confusing for the MIDI USB wrapper, but allows for the use of real standardized MIDI command values.

Demos/Device/ClassDriver/MIDI/MIDI.c

@@ -139,9 +139,9 @@ void CheckJoystickMovement(void)
 		USB_MIDI_EventPacket_t MIDIEvent = (USB_MIDI_EventPacket_t)
 			{
 				.CableNumber = 0,
-				.Command     = MIDICommand,
+				.Command     = (MIDICommand >> 4),
 				
-				.Data1       = (MIDICommand << 4) | Channel,
+				.Data1       = MIDICommand | Channel,
 				.Data2       = MIDIPitch,
 				.Data3       = MIDI_STANDARD_VELOCITY,			
 			};