glib allocated memory area(s).
(strdup_convert): Rename to ...
(convert): ... this. Don't strdup passed string.
(get_args): Use convert instead of strdup_convert.
(free_args): Make it do notning macro.
(open_include_file): Eliminate p array. Use glib function to
construct error_file_name. Use PATH_SEP instead of '/';
(edit_read_syntax_file): Use PATH_SEP_STR.
(edit_load_syntax): Use syntax_g_free to release error_file_name.
(edit_read_syntax_rules): Likewise.
3eea969c3b