Return first path if Assets.getPath refers to a path group

lime/utils/AssetLibrary.hx

@@ -308,8 +308,20 @@ class AssetLibrary {
 	
 	public function getPath (id:String):String {
 		
+		if (paths.exists (id)) {
+			
 			return paths.get (id);
 			
+		} else if (pathGroups.exists (id)) {
+			
+			return pathGroups.get (id)[0];
+			
+		} else {
+			
+			return null;
+			
+		}
+		
 	}