2004-06-28  Michael Natterer  <mitch@gimp.org>

	Fixed bug #141930 while keeping bug #132322 fixed:

	* app/base/curves.c (curves_lut_func)
	* app/base/levels.c (levels_lut_func): changed meaning of channel
	slots for GRAYA images: just as for GRAY images, expect the value
	channel in slot 0 and the alpha channel in slot 1, so it matches
	the meaning of slots of GimpHistogram (before this change, only
	GRAY images had their value in slot 0 and GRAYA images had it in
	slot 1, whereas the histogram had the value channel in slot 0,
	which was breaking auto levels for GRAYA images).

	* app/tools/gimpcurvestool.c
	* app/tools/gimplevelstool.c
	* tools/pdbgen/pdb/color.pdb: adjusted channel fiddling for GRAY
	and GRAYA images accordingly.

	* app/tools/gimpcurvestool.c (curves_update)
	* app/tools/gimplevelstool.c (levels_update): call
	gimp_color_bar_set_buffers() with the right buffers.

	* app/pdb/color_cmds.c: regenerated.