2001-02-07  Michael Natterer  <mitch@gimp.org>

	* app/gimpbrush.[ch]
	* app/gimpbrushpreview.c: moved the scale and pipe indicator
	rendering code from GimpBrush to GimpBrushPreview.
	Removed the "dirty" signal from GimpBrush and use
	"invalidate_preview" of the GimpViewable class.

	* app/brush_edit.c
	* app/brush_select.c
	* app/gimpbrushgenerated.c
	* app/gimpcontext.c
	* app/gimpcontextpreview.c
	* app/tools/paint_core.c: changed accordingly.