Yet another hanging variable in event code - code cleanup woes.

This should make trackpads work.

source/blender/windowmanager/intern/wm_event_system.c

@@ -2789,7 +2789,9 @@ void wm_event_add_ghostevent(wmWindowManager *wm, wmWindow *win, int type, int U
 				event.x = evt->x = cx;
 				event.y = evt->y = (win->sizey - 1) - cy;
 			}
-
+			
+			event->val= 0;
+			
 			/* Use prevx/prevy so we can calculate the delta later */
 			event.prevx = event.x - pd->deltaX;
 			event.prevy = event.y - (-pd->deltaY);