Pass context down the implementation to check for the main_group. Bug

Pass context down the implementation to check for the main_group. Bug

2008-01-25  Loïc Minier  <lool@dooz.org>

       * glib/goption.c: (group_has_visible_entries),
       (group_list_has_visible_entires), (g_option_context_get_help): Pass
       context down the implementation to check for the main_group.
       Bug #510292.
       * glib/tests/option-context.c:
       Don't set G_OPTION_FLAG_IN_MAIN in main_entries
       (group_captions): only create group when actually adding it to the
       context; add an exit(0) to make sure the test succeeds.

svn path=/trunk/; revision=6377