dix: update the sprite trace for all masters && floating slaves (#23257)

When the windows are restructured, CheckMotion needs to be called for all
masters and floating slaves to update the spriteTrace.

X.Org Bug 23257 <http://bugs.freedesktop.org/show_bug.cgi?id=23257>

Tested-by: Thomas Jaeger
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

dix/events.c

@@ -2841,7 +2841,7 @@ WindowsRestructured(void)
     DeviceIntPtr pDev = inputInfo.devices;
     while(pDev)
     {
-        if (DevHasCursor(pDev))
+        if (IsMaster(pDev) || !pDev->u.master)
             CheckMotion(NULL, pDev);
         pDev = pDev->next;
     }