* app/app_procs.c: fixed up idle handler for file open (look like testgtk
idle demo)

* app/colomaps.c: fixup for visual test and use of gdk_color_alloc for some
fixed colors (from Owen Taylor)

* app/errors.h
* app/errors.c
* app/main.c
* libgimp/gimp.c: redid the signal handlers so we only get a debug prompt on
SIGSEGV, SIGBUS, and SIGFPE.

* applied gimp-jbuhler-980408-0 and gimp-joke-980409-0 (warning fixups)

* applied gimp-monnaux-980409-0 for configurable plugin path for multiarch
setups

-Yosh