linha verde theme added by Jose
	* configure.in: release 5.2
	* gcompris.spec.in: added new sounds
	* po/POTFILES.in: added chronos
	* src/gcompris/gameutil.c: (gcompris_load_pixmap): changed to display a dialog box instead of a direct exit when an image is missing.
	* src/gcompris/log.c: (gcompris_log_end): fixed to compile with old gcc