make sure, hidden automation-tracks are not muted when loading

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1317 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/tracks/automation_track.cpp

@@ -119,6 +119,11 @@ void automationTrack::saveTrackSpecificSettings( QDomDocument & _doc,
 
 void automationTrack::loadTrackSpecificSettings( const QDomElement & _this )
 {
+	// just in case something somehow wrent wrong...
+	if( type() == HiddenAutomationTrack )
+	{
+		setMuted( FALSE );
+	}
 }