InstrumentMidiIOView: added support for fixed output notes

It came to me that having LMMS output one fixed note from a track could
be useful for controlling drum machines or something like that, so here's
a new spinbox for the MIDI tab.

Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>

include/InstrumentMidiIOView.h

@@ -55,6 +55,7 @@ private:
 	lcdSpinBox * m_outputChannelSpinBox;
 	lcdSpinBox * m_fixedOutputVelocitySpinBox;
 	lcdSpinBox * m_outputProgramSpinBox;
+	lcdSpinBox * m_fixedOutputNoteSpinBox;
 	QToolButton * m_wpBtn;
 
 } ;

include/MidiPort.h

@@ -56,6 +56,8 @@ class MidiPort : public Model, public SerializingObject
 						m_fixedInputVelocityModel);
 	mapPropertyFromModel(int,fixedOutputVelocity,setFixedOutputVelocity,
 						m_fixedOutputVelocityModel);
+	mapPropertyFromModel(int,fixedOutputNote,setFixedOutputNote,
+						m_fixedOutputNoteModel);
 	mapPropertyFromModel(int,outputProgram,setOutputProgram,
 						m_outputProgramModel);
 	mapPropertyFromModel(bool,isReadable,setReadable,m_readableModel);
@@ -155,6 +157,7 @@ private:
 	IntModel m_outputControllerModel;
 	IntModel m_fixedInputVelocityModel;
 	IntModel m_fixedOutputVelocityModel;
+	IntModel m_fixedOutputNoteModel;
 	IntModel m_outputProgramModel;
 	BoolModel m_readableModel;
 	BoolModel m_writableModel;

include/midi.h

@@ -85,6 +85,7 @@ const int MidiChannelCount = 16;
 const int MidiControllerCount = 128;
 const int MidiProgramCount = 128;
 const int MidiMaxVelocity = 127;
+const int MidiMaxNote = 127;
 
 const int MidiMaxPanning = 127;
 const int MidiMinPanning = -128;