Automtion Editor - left click response

When you left click an existing value the automation point will only
snap to the new value if it is higher. If it is lower the mouse click
event will 'break'.

Cleanup. Remove statement that will always evaluate as 'true'.

src/gui/editors/AutomationEditor.cpp

@@ -517,16 +517,13 @@ void AutomationEditor::mousePressEvent( QMouseEvent* mouseEvent )
 			// loop through whole time-map...
 			while( it != time_map.end() )
 			{
-				MidiTime len = 4;
-
 				// and check whether the user clicked on an
 				// existing value
 				if( pos_ticks >= it.key() &&
-					len > 0 &&
 					( it+1==time_map.end() ||
 						pos_ticks <= (it+1).key() ) &&
 		( pos_ticks<= it.key() + MidiTime::ticksPerTact() *4 / m_ppt ) &&
-					level <= it.value() )
+					level == it.value() )
 				{
 					break;
 				}