d.vect: don't show categories of boundaries for PostGIS link

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@51081 15284696-431f-4ddb-bdfa-cd5b030d7da7

display/d.vect/label.c

@@ -23,7 +23,8 @@ int display_label(struct Map_info *Map, int type,
     Vect_rewind(Map);
 
     ogr_centroids = FALSE;
-    if (Vect_maptype(Map) == GV_FORMAT_OGR) {
+    if (Vect_maptype(Map) == GV_FORMAT_OGR ||
+	Vect_maptype(Map) == GV_FORMAT_POSTGIS) {
 	if (Vect_level(Map) < 2)
 	    G_warning(_("Topology level required for drawing centroids "
 			"for OGR layers"));