2000-12-19  Michael Natterer  <mitch@gimp.org>

	* app/Makefile.am
	* app/gimphistogramP.h: removed.

	* app/gimphistogram.[ch]
	* app/histogramwidget.[ch]: Histogram cleanup: replaced the
	channel #define's by a properly named enum and use this enum
	type as parameter in functions instead of "int".

	* app/curves.c
	* app/histogram_tool.c
	* app/levels.c: changed accordingly.