avoid confusion with east_north coords

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@52215 15284696-431f-4ddb-bdfa-cd5b030d7da7

display/d.where/main.c

@@ -48,7 +48,7 @@ int main(int argc, char **argv)
 	  "point locations given in display coordinates.");
 
     coords = G_define_option();
-    coords->key = "coordinates";
+    coords->key = "at";
     coords->key_desc = "x,y";
     coords->type = TYPE_DOUBLE;
     coords->required = NO;