Fix problem with installation directory for gdkx.h

Fix problem with installation directory for gdkx.h

Fri Apr  7 17:19:27 2000  Owen Taylor  <otaylor@redhat.com>

	* gdk/x11/Makefile.am: Fix problem with installation directory for
	gdkx.h

	* gtk/gtkmenuitem.c gtk/gtkmenushell.c: Patch from David Santiago
	<mrcooger@cyberverse.com> so that when selecting menus with the
	mouse, the first item will not be selected, but when selecting
	with an accelerator, or navigating left-right on a menubar with
	the menus popped up, the first item will be selected.