Get_Area(), Event, and grab fixes

This commit fixes the following things:
 - Get_Area() now properly returns the area
 - Events will no longer runtime upon being manually triggered by an admin
 - The prison break event works again
 - Grabbing will no longer runtime (May result in people with pixel
   offsets from a grab being stuck, better than a runtime)

code/modules/mob/mob_grab.dm

@@ -408,10 +408,11 @@
 	..()
 
 /obj/item/weapon/grab/Destroy()
-	affecting.pixel_x = 0
-	affecting.pixel_y = 0 //used to be an animate, not quick enough for del'ing
-	affecting.layer = initial(affecting.layer)
-	if(affecting) affecting.grabbed_by -= src
+	if(affecting)
+		affecting.pixel_x = 0
+		affecting.pixel_y = 0 //used to be an animate, not quick enough for del'ing
+		affecting.layer = initial(affecting.layer)
+		affecting.grabbed_by -= src
 	del(hud)
 	..()