Add pragma that will prevent warnings when you are not using -std=99 and

Add pragma that will prevent warnings when you are not using -std=99 and

2001-12-09  Christopher Blizzard  <blizzard@redhat.com>

        * glib/gmessages.h: Add pragma that will prevent warnings when you
        are not using -std=99 and newer gcc compilers.  Patch from Red
        Hat's gtk+ 1.2 rpm.