2001-04-23  Sven Neumann  <sven@gimp.org>

	Merged Yosh's changes from stable branch:

	* acinclude.m4: updated libtool stuff

        * configure.in: more #undefs so jpeglib.h test works

        * plug-ins/common/bumpmap.c: speedup patch from Ernst Lippe
        <ernstl@planet.nl> (tile cache size optimization)