2001-01-14  Sven Neumann  <sven@gimp.org>

	Merged fixes from gimp-1-2:

	* app/menus.c
	* app/plug-in.c: added some sanity checks for passed string pointers
	to various public functions in an attempt to fix bug #37622.

	* plug-ins/common/sharpen.c: applied a patch from Jerome Zago
        <jzago@ifhamy.insa-lyon.fr> that fixes a longstanding bug in the
        sharpen filter which sometimes got the last line wrong.
	Fixes bug #34155.