g.region: use standardized option for region

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@58671 15284696-431f-4ddb-bdfa-cd5b030d7da7

general/g.region/main.c

@@ -156,14 +156,8 @@ int main(int argc, char *argv[])
 
     /* parameters */
 
-    parm.region = G_define_option();
-    parm.region->key = "region";
-    parm.region->key_desc = "name";
-    parm.region->required = NO;
-    parm.region->multiple = NO;
-    parm.region->type = TYPE_STRING;
+    parm.region = G_define_standard_option(G_OPT_M_REGION);
     parm.region->description = _("Set current region from named region");
-    parm.region->gisprompt = "old,windows,region";
     parm.region->guisection = _("Existing");
 
     parm.raster = G_define_standard_option(G_OPT_R_MAP);