[PATCH] Small SetParent fix

[gerard patel]

Calling SetParent of a child window does not create a X counterpart in current Cvs
if parent = 0.
Fixes one at least of the 2 crashes I had pointed to with the User patch of 24 april.

ChangeLog:

	* dlls/x11drv/window.c
                  creates (again) a X counterpart for children windows reparented to 0