PHOTON ONLY: Added a Kung Foo Deathgrip to the Timer Event handler

so the timer could not be destroyed while inside the callback. I
did it just like GTK did it. It was crashing at http://www.uescape.com

widget/timer/src/unix/photon/nsTimerPh.cpp

@@ -214,10 +214,14 @@ nsTimerPh::Cancel()
 int nsTimerPh::TimerEventHandler( void *aData, pid_t aRcvId, void *aMsg, size_t aMsgLen )
 {
   int localTimerId;
-
   nsTimerPh* timer = (nsTimerPh *)aData;
-  if( timer )
-  {
+
+  PR_LOG(PhTimLog, PR_LOG_DEBUG, ("nsTimerPh::TimerEventHandler this=<%p>\n", aData));
+  NS_ASSERTION(timer, "nsTimerPh::TimerEventHandler is NULL!");
+
+  // because Notify can cause 'timer' to get destroyed, we need to hold a ref
+  nsCOMPtr<nsITimer> kungFuDeathGrip = timer;
+
   localTimerId = timer->mTimerId;
 	
   if( timer->mFunc != NULL )
@@ -229,10 +233,6 @@ int nsTimerPh::TimerEventHandler( void *aData, pid_t aRcvId, void *aMsg, size_t
     timer->mCallback->Notify( timer );
   }
 
-/* These stupid people destroy this object inside the callback */
-/* so don't do anything with it from here on */
-  }
-
   return Pt_CONTINUE;
 }