2006-10-18  Michael Natterer  <mitch@gimp.org>

	Applied modified patch from Martin Nordholts which adds a "Rounded
	Corners" option to the rectangle select tool. Fixes bug #86279.

	* app/core/gimpchannel-combine.[ch]: added
	gimp_channel_combine_ellipse_rect(). Use it from
	gimp_channel_combine_ellipse().

	* app/core/gimpchannel-select.[ch]: added
	gimp_channel_select_round_rect()

	* app/tools/gimprectangleselectoptions.[ch]: added properties
	"round-corners" and "corner-radius" and GUI for the new propeties.

	* app/tools/gimprectangleselecttool.h: added macro
	GIMP_RECT_SELECT_TOOL_GET_OPTIONS().

	* app/tools/gimprectangleselecttool.c (gimp_rect_select_tool_draw):
	draw round corners if enabled.

	(gimp_rect_select_tool_real_select): use
	gimp_channel_select_round_rect() if enabled.

	* app/tools/gimpselectionoptions.[ch]: added "antialias_toggle"
	to the GimpSelectionOptions struct so the rect select options
	can set its sensitivity.

	Unrelated:

	* app/tools/gimpellipseselecttool.c (gimp_ellipse_select_tool_draw):
	use 360 * 64 instead of 23040.