--- a/src/group_cmd.cpp	Mon Jun 18 19:42:48 2007 +0000
+++ b/src/group_cmd.cpp	Mon Jun 18 19:53:50 2007 +0000
@@ -110,7 +110,7 @@
 		InvalidateWindowData(GetWCForVT(vt), (vt << 11) | VLW_GROUP_LIST | _current_player);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 
@@ -156,7 +156,7 @@
 		InvalidateWindowData(GetWCForVT(vt), (vt << 11) | VLW_GROUP_LIST | _current_player);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 
@@ -187,7 +187,7 @@
 		InvalidateWindowData(GetWCForVT(g->vehicle_type), (g->vehicle_type << 11) | VLW_GROUP_LIST | _current_player);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 
@@ -235,7 +235,7 @@
 		InvalidateWindowData(GetWCForVT(v->type), (v->type << 11) | VLW_GROUP_LIST | _current_player);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 /**
@@ -271,7 +271,7 @@
 		InvalidateWindowData(GetWCForVT(type), (type << 11) | VLW_GROUP_LIST | _current_player);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 
@@ -307,7 +307,7 @@
 		InvalidateWindowData(GetWCForVT(type), (type << 11) | VLW_GROUP_LIST | _current_player);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 
@@ -332,7 +332,7 @@
 		InvalidateWindowData(GetWCForVT(g->vehicle_type), (g->vehicle_type << 11) | VLW_GROUP_LIST | _current_player);
 	}
 
-	return 0;
+	return CommandCost();
 }
 
 /**