fixup OS X compilation (for BFS-disabled) by reapply bugfix #16694

See irclogs
http://www.wesnoth.org/irclogs/2014/11/%23wesnoth-dev.2014-11-08.log

Conflicts:
	src/gettext.cpp
Merge branch '1.12' of https://github.com/wesnoth/wesnoth into 1.12