2003-11-25  Sven Neumann  <sven@gimp.org>

	* libgimpbase/gimplimits.h: added GIMP_MAX_MEMSIZE, an arbitrary
	upper limit for memory sizes. It must be smaller than G_MAXDOUBLE
	since our memsize entry doesn't handle anything larger.

	* app/widgets/gimppropwidgets.c (gimp_prop_memsize_entry_new):
	check against GIMP_MAX_MEMSIZE, not G_MAXDOUBLE.

	* app/config/gimpbaseconfig.c
	* app/config/gimpcoreconfig.c
	* app/config/gimpguiconfig.c: use GIMP_MAX_MEMSIZE instead of
	G_MAXULONG. The latter is larger than G_MAXDOUBLE on 64bit
	machines and caused bug #127908.

	* libgimpwidgets/gimpmemsizeentry.c: added casts to guint64.