new function g_log_set_always_fatal() to set an additional fatal_mask for

new function g_log_set_always_fatal() to set an additional fatal_mask for

Tue Aug 18 04:40:17 1998  Tim Janik  <timj@gtk.org>

        * glib.h:
        * gmessages.c: new function g_log_set_always_fatal() to set an
        additional fatal_mask for log levels that are considered to be fatal
        globally (required by gtk). since this mask is not domain-associated,
        it is restricted to the log levels, introduced by glib itself.

        * gmem.c:
        * grel.c:
        * gtree.c (g_tree_node_check):
        don't use g_print() calls for informational/debugging output,
        but log all this stuff through g_log() with G_LOG_LEVEL_INFO.
        libraries shouldn't use printf(), g_print() or g_printerr() at all.