2007-08-31  Simon Budig  <simon@gimp.org>

	* plug-ins/script-fu/tinyscheme/scheme.[ch]
	* plug-ins/script-fu/tinyscheme/scheme-private.h: make it possible
	for foreign functions to return an error.

	* plug-ins/script-fu/script-fu-scripts.c
	* plug-ins/script-fu/scheme-wrapper.c: Make use of this.
	Fixes bug #472026.


svn path=/trunk/; revision=23432