abandon the use of ATEXIT(), we keep the fallback macros for backwards

abandon the use of ATEXIT(), we keep the fallback macros for backwards

Tue Sep  8 05:04:06 1998  Tim Janik  <timj@gtk.org>

        * glib.h: abandon the use of ATEXIT(), we keep the fallback
        macros for backwards compatibility. people ought to use g_atexit().

        * gutils.c (g_atexit): new function to take over the implementation
        of ATEXIT. this function is guarranteed to succeed, similar to
        g_malloc().