Move here, and save/restore the X error handler to allow people using GTK+

Move here, and save/restore the X error handler to allow people using GTK+

Thu Jan 17 13:08:34 2002  Owen Taylor  <otaylor@redhat.com>

	* gdk/x11/gdkmain-x11.c (gdk_error_trap_push): Move
	here, and save/restore the X error handler to allow
	people using GTK+ to set the X error handler to something
	custom without disturbing the operation of GDK.

	* gdk/linux-fb/gdkmain-fb.c (gdk_error_trap_push)
	* gdk/win32/gdkmain-win32.c (gdk_error_trap_pop): Add
	dummy implementations.

	* gdk/x11/gdkmain-x11.c gdk/x11/gdkevents-x11.c
	gdk/x11/gdkdnd-x11.c: Use gdk_error_trap_push()/pop()
	for all error trapping.

	* gdk/x11/gdkdnd-x11.c: Remove '#if 0' code.

	* gdk/x11/gdkdnd-x11.c (gdk_window_cache_new): Fix
	problem where we would add the results anyways,
	and then add it again if no error occurred, and problem
	where we could leave _gdk_error_warnings() unset.