defs/gis.h: Add missing G_option_excludes

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@62243 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/defs/gis.h

@@ -521,6 +521,7 @@ void G_option_exclusive(void *, ...);
 void G_option_required(void *, ...);
 void G_option_requires(void *, ...);
 void G_option_requires_all(void *, ...);
+void G_option_excludes(void *, ...);
 void G_option_collective(void *, ...);
 
 /* paths.c */