2005-08-06  Sven Neumann  <sven@gimp.org>

	* app/display/gimpcanvas.c (gimp_canvas_set_custom_gc) do not
	drop the reference if the same custom GC is being set again.

	* app/display/gimpdisplayshell-draw.[ch]
	* app/display/gimpdisplayshell-handlers.c
	* app/display/gimpdisplayshell.[ch]: added GC and methods to draw
	on the canvas with a solid pen.

	* app/tools/gimpforegroundselectoptions.[ch]
	* app/tools/gimpforegroundselecttool.c: draw using the new pen
	functions. Scale the stroke width with the display scale.