Fixed bug - Instruments had wrong channel models

Instruments were initialized with hardcoded 0-10 for min/max
channel selector range. Fixed.

src/core/FxMixer.cpp

@@ -512,7 +512,7 @@ void FxMixer::saveSettings( QDomDocument & _doc, QDomElement & _this )
 	}
 }
 
-
+// make sure we have at least num channels
 void FxMixer::allocateChannelsTo(int num)
 {
 	while( num > m_fxChannels.size() - 1 )

src/gui/FxMixerView.cpp

@@ -196,14 +196,13 @@ void FxMixerView::refreshDisplay()
 		chLayout->addWidget(m_fxChannelViews[i]->m_fxLine);
 	}
 
-	// fix master
-//TODO
+	updateMaxChannelSelector();
 }
 
 
+// update the and max. channel number for every instrument
 void FxMixerView::updateMaxChannelSelector()
 {
-	// update the and max. channel number for every instrument
 	QVector<track *> songTrackList = engine::getSong()->tracks();
 	QVector<track *> bbTrackList = engine::getBBTrackContainer()->tracks();
 
@@ -439,6 +438,7 @@ void FxMixerView::setCurrentFxLine( int _line )
 void FxMixerView::clear()
 {
 	m_rackView->clearViews();
+	refreshDisplay();
 }
 
 

src/tracks/InstrumentTrack.cpp

@@ -103,13 +103,14 @@ InstrumentTrack::InstrumentTrack( trackContainer * _tc ) :
 							this, tr( "Panning" ) ),
 	m_pitchModel( 0, -100, 100, 1, this, tr( "Pitch" ) ),
 	m_pitchRangeModel( 1, 1, 24, this, tr( "Pitch range" ) ),
-	m_effectChannelModel( 0, 0, 10, this, tr( "FX channel" ) ), // change this so it's a combo box, all the channels and then new.
+	m_effectChannelModel( 0, 0, 0, this, tr( "FX channel" ) ), // change this so it's a combo box, all the channels and then new.
 	m_instrument( NULL ),
 	m_soundShaping( this ),
 	m_arpeggiator( this ),
 	m_chordCreator( this ),
 	m_piano( this )
 {
+	m_effectChannelModel.setRange( 0, engine::fxMixer()->numChannels()-1, 1);
 	connect( baseNoteModel(), SIGNAL( dataChanged() ),
 			this, SLOT( updateBaseNote() ) );
 	connect( &m_pitchModel, SIGNAL( dataChanged() ),