applied patch from Xan Lopez which adds GTK_BUTTONBOX_CENTER to

applied patch from Xan Lopez which adds GTK_BUTTONBOX_CENTER to

Thu Feb  8 13:07:08 2007  Tim Janik  <timj@imendio.com>

        * applied patch from Xan Lopez which adds GTK_BUTTONBOX_CENTER to
        GtkButtonBox (bug #336159).

        * gtk/gtkenums.h:
        * gtk/gtkvbbox.c, gtk/gtkhbbox.c, gtk/gtkbbox.c:
        support GTK_BUTTONBOX_CENTER.

        * tests/testbbox.c: new button box test, which allows testing of
        the various button box properties.

        * tests/testgtk.c: added GTK_BUTTONBOX_CENTER. to button box test.

svn path=/trunk/; revision=17276