Unregistering events in XSelectInput() when unregistering IM filter

callbacks may be a bad idea as others may be interested in this event.
    Removed the call to XSelectInput() altogether as we are in root window
    anyway (Lubos Lunak).
Fix size of a variable that gets assigned the value of SmartScheduleTime
    (long) to long. This should help to prevent smart scheduler lockup on
    64 bit systems due to overruns (Andreas Schwab).

dix/dispatch.c

@@ -362,7 +362,7 @@ Dispatch(void)
     register int	nready;
     register HWEventQueuePtr* icheck = checkForInput;
 #ifdef SMART_SCHEDULE
-    int			start_tick;
+    long			start_tick;
 #endif
 
     nextFreeClientID = 1;