Cast uints to ints in geometry calculations. This should prevent FP

Cast uints to ints in geometry calculations. This should prevent FP

Mon Feb  1 14:54:28 1999  Owen Taylor  <otaylor@redhat.com>

	* gtk/gtklabel.c (gtk_label_expose): Cast uints
	  to ints in geometry calculations. This should
	  prevent FP exceptions on FreeBSD when quantities
	  become negative. [ Actually, this is probably
	  a workaround with a gcc bug with handling of
	  bitfields, according to Ben Jackson <ben@ben.com> ]