keyword filter added

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@56798 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.mfilter/main.c

@@ -56,6 +56,7 @@ int main(int argc, char **argv)
     G_add_keyword(_("raster"));
     G_add_keyword(_("algebra"));
     G_add_keyword(_("statistics"));
+    G_add_keyword(_("filter"));
     module->description = _("Performs raster map matrix filter.");
 
     /* Define the different options */

raster/r.neighbors/main.c

@@ -141,6 +141,7 @@ int main(int argc, char *argv[])
     G_add_keyword(_("algebra"));
     G_add_keyword(_("statistics"));
     G_add_keyword(_("aggregation"));
+    G_add_keyword(_("filter"));
     module->description =
 	_("Makes each cell category value a "
 	  "function of the category values assigned to the cells "