made muting automation-tracks work (closes #2010770)

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1275 0778d3d1-df1d-0410-868b-ea421aaaa00d

ChangeLog

@@ -1,5 +1,8 @@
 2008-07-05	Tobias Doerffel	<tobydox/at/users/dot/sourceforge/dot/net>
 
+	* src/tracks/automation_track.cpp:
+	made muting automation-tracks work (closes #2010770)
+
 	* src/tracks/bb_track.cpp:
 	made muting BB-tracks work (closes #2010764)
 

src/tracks/automation_track.cpp

@@ -55,6 +55,11 @@ automationTrack::~automationTrack()
 bool automationTrack::play( const midiTime & _start, const fpp_t _frames,
 				const f_cnt_t _frame_base, Sint16 _tco_num )
 {
+	if( isMuted() )
+	{
+		return( FALSE );
+	}
+
 	tcoVector tcos;
 	getTCOsInRange( tcos, _start, _start + static_cast<int>(
 					_frames / engine::framesPerTick() ) );