(svn r6714) -Codechange: replaced a direct manipulation of windows with InvalidateWindowData() in rail_cmd.c

Moved the actual modification of railtype to WE_INVALIDATE_DATA in the train depot handler
-Codechange: added SetWindowDirty() to WE_INVALIDATE_DATA as it made no sense to update the list without making the window dirty

aircraft_gui.c

@@ -548,6 +548,7 @@ static void NewAircraftWndProc(Window *w, WindowEvent *e)
 
 		case WE_INVALIDATE_DATA:
 			WP(w,buildvehicle_d).data_invalidated = true;
+			SetWindowDirty(w);
 			break;
 
 		case WE_DESTROY: