gis.h: parser_dependencies.c comment

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@61008 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/defs/gis.h

@@ -501,6 +501,7 @@ char *G_option_to_separator(const struct Option *);
 FILE *G_open_option_file(const struct Option *);
 void G_close_option_file(FILE *);
 
+/* parser_dependencies.c */
 void G_option_exclusive(void *first, ...);
 void G_option_required(void *first, ...);
 void G_option_requires(void *first, ...);