removed return_if_fail (label->words != NULL) since that's a valid case

removed return_if_fail (label->words != NULL) since that's a valid case

Sat Dec 19 05:37:51 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtklabel.c (gtk_label_expose): removed return_if_fail
        (label->words != NULL) since that's a valid case when the label
        is empty, or just default constructed.
        fixed indentation prototype arguments and braces in some places.
        also, pointer comparisions and initializations are done with NULL
        not 0, there's a reason GLib defines NULL.

        * gdk/gdkevents.c (gdk_events_pending): return (queued_events ||
        putback_events) so this again returns whether events are pending,
        not whether other sources like idles are pending.

        * gtk/gtkmain.c (gtk_main_iteration_do):
        (gtk_main_iteration): return whether the loop is done, not whether
        something got dispatch to restore the original behaviour (yosh: this
        fixes code like in GleSelector).