2002-10-15  Sven Neumann  <sven@gimp.org>

	* app/base/levels.[ch]: added the API for level correction using
	black, gray and white point.

	* app/tools/gimpcurvestool.c
	* app/tools/gimphistogramtool.c
	* app/tools/gimplevelstool.[ch]: misc smaller changes.

	* app/widgets/gimphistogrambox.[ch]: allocate the buffer for the
	gradient preview on size_allocate, not for every expose event.

	* app/widgets/gimphistogramview.c: fixed drawing for width > 256.

	* themes/Default/images/stock-color-picker-white-18.png: tweaked.