GUI bug fix: disable double-click for new sim path as appropriate.

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@549 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/userinterface/simulator/GUISimulator.java

@@ -1879,7 +1879,7 @@ public class GUISimulator extends GUIPlugin implements MouseListener, ListSelect
 		{
 			if(e.getClickCount() == 2 && e.getSource() == pathTablePlaceHolder)
 			{				
-				a_newPath();
+				if (newPath.isEnabled()) a_newPath();
 			}
 			if(e.isPopupTrigger() && (e.getSource() == pathTablePlaceHolder || e.getSource() == pathTable || e.getSource() == pathTable.getTableHeader() || e.getSource() == tableScroll))
 			{