Fix for build with scons whithout i18n support.

This should not be needed, I really see no reason for this linking error, but I'd rather use this hack than wasting more time over this issue. When will we get rid of this "two build systems to maintain" time-wasting situation?

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53999 954f8c5b-7b00-dc11-b283-0030488c597c