if input_name is NULL, print out "<memory>" instead of completely skipping

if input_name is NULL, print out "<memory>" instead of completely skipping

Thu Oct 10 23:27:02 2002  Tim Janik  <timj@gtk.org>

        * glib/gscanner.c (g_scanner_msg_handler): if input_name is NULL,
        print out "<memory>" instead of completely skipping input specification
        and thusly loosing error line information.