2006-08-29  Sven Neumann  <sven@gimp.org>

	* libgimpbase/Makefile.am
	* libgimpbase/gimpbase.h
	* libgimpbase/gimprectangle.[ch]: added new files that hold
	gimp_rectangle_intersect(), factored out of the core.

	* libgimpbase/gimpbase.def: updated.

	* app/core/gimp-edit.c
	* app/core/gimp-utils.c
	* app/core/gimp-utils.h
	* app/core/gimpchannel-combine.c
	* app/core/gimpdrawable-foreground-extract.c
	* app/core/gimpdrawable-transform.c
	* app/core/gimpdrawable.c
	* app/core/gimpimage-preview.c
	* app/core/gimplayer.c
	* app/core/gimpscanconvert.c
	* app/display/gimpdisplayshell-draw.c: changed includes accordingly.

	* libgimp/gimpdrawablepreview.c: don't duplicate
	gimp_rectangle_intersect() here, use the function in libgimpbase.

	* app/base/siox.c: use gimp_rectangle_intersect() to reduce the
	working area to the region of interest. Fixes bug #340422.