2003-03-06  Matthias Clasen  <maclas@gmx.de>

	* gtk/gtktextmark.c (gtk_text_mark_get_buffer):
	* gtk/gtkeditable.c (gtk_editable_get_chars):
	* gtk/gtkctree.c (gtk_ctree_find_node_ptr):
	* demos/gtk-demo/main.c (demo_find_file): Fix NULL/FALSE confusion
	(#107648, Morten Welinder)