Adel Gadllah 7c534a87cf dnd: Don't pass null to ClutterActor.disconnect()
_ungrabActor disconnects the event signal handler but does not
check whether it is connected before doing so which can result into
an exception like:

JS ERROR: !!!   Exception was: Error: disconnect() takes one arg, the signal handler id
JS ERROR: !!!     lineNumber = '0'
JS ERROR: !!!     fileName = 'gjs_throw'
JS ERROR: !!!     stack = 'Error("disconnect() takes one arg, the signal handler id")@:0
2011-02-28 22:41:11 +01:00
..
2011-02-26 00:06:44 +01:00
2011-02-19 11:19:19 +01:00
2011-02-24 21:22:44 +01:00
2011-02-28 16:08:18 -05:00
2011-02-24 21:22:44 +01:00