random() and add -lucb on systems that need it. Fix for xdelta.h check. Find
xemacs as well as emacs. Properly define settings for print plugin.

app/Makefile.am: ditch -DNDEBUG, since nothing uses it

flame: properly handle random() and friends

pnm: workaround for systems with old sprintfs

print, sgi: fold back in portability fixes

threshold_alpha: properly get params in non-interactive mode

bmp: updated and merged in

-Yosh