2006-09-26  Michael Natterer  <mitch@gimp.org>

	* app/paint/gimppaintcore.[ch]: added GError** parameter to
	GimpPaintCore::start().

	* app/tools/gimppainttool.c (button_press): display the error in
	the statusbar.

	* app/paint/gimppaintcore-stroke.c: pass a NULL error, effectively
	swallowing mssages. Will fix that later.

	* app/paint/gimpbrushcore.c
	* app/paint/gimpclone.c
	* app/paint/gimpsourcecore.c: changed accordingly. Set the error
	instead of calling g_message().

	* app/paint/gimpheal.c
	* app/paint/gimpperspectiveclone.c: implement start() and bail out
	early on indexed drawables instead of showing a g_message() in
	other functions that are called later.

	* app/tools/gimptool.[ch]: added GError** to GimpTool::initialize().

	* app/tools/gimptool.c (gimp_tool_initialize): display the error
	in the statusbar. Keep the external API GError-free.

	* app/tools/gimprectangletool.[ch]: added GError** to
	gimp_rectangle_tool_initialize().

	* app/tools/gimpbrightnesscontrasttool.c
	* app/tools/gimpcolorbalancetool.c
	* app/tools/gimpcolorizetool.c
	* app/tools/gimpcroptool.c
	* app/tools/gimpcurvestool.c
	* app/tools/gimphuesaturationtool.c
	* app/tools/gimpimagemaptool.c
	* app/tools/gimplevelstool.c
	* app/tools/gimpperspectiveclonetool.c
	* app/tools/gimpposterizetool.c
	* app/tools/gimpthresholdtool.c
	* app/tools/gimptransformtool.c: changed accordingly. Set the
	errors in initialize() instead of using gimp_message().

	* app/tools/gimpblendtool.c: implement initialize() and bail out
	early on indexed images instead of showing a gimp_message() in
	button_press().