Added gdk_text_extents_wc()

Added gdk_text_extents_wc()

Tue Dec 15 14:30:35 1998  Owen Taylor  <otaylor@redhat.com>

	* gdk/gdk.h gdk/gdkfonts.c: Added gdk_text_extents_wc()

        * Patch from Jonathan Blanford <jrb@redhat.com> to add line wrapping
	  to label. (Based on patch from Jeff Dairiki
	  <dairiki@mac-ceope.apl.washington.edu> gtk-dairiki-971208-0)

	- Adds new function gtk_label_set_line_wrap()
	- implement GTK_JUSTIFY_FILL.
	- rename gtk_label_set to gtk_label_set_text() add
	   gtk_label_set() to gtkcompat.h.

	* Use an internal wc representation in the label, so
	  that we handle underlining and line breaks correctly
	  for multi-byte strings.