Add Dual MIDI device class driver demo application.

LUFA/Drivers/USB/Class/Common/MIDIClassCommon.h

@@ -345,7 +345,7 @@
 		 */
 		typedef struct
 		{
-			uint8_t Event; /**< MIDI event type, constructed with the \ref MIDI_EVENT() macro. */
+			uint8_t  Event; /**< MIDI event type, constructed with the \ref MIDI_EVENT() macro. */
 
 			uint8_t  Data1; /**< First byte of data in the MIDI event. */
 			uint8_t  Data2; /**< Second byte of data in the MIDI event. */