fix explicitly changing tiles

src/main.cpp

@@ -1096,7 +1096,7 @@ static void process_event_editor(SDL_Event event) {
                         }
                     }
 
-                    renderer_texture_update(current_map.texture, 0, 0, current_map.size.x, current_map.size.y, current_map.tiles, current_map.size.x * sizeof(Uint32));
+                    renderer_texture_update(current_map.texture, 0, 0, current_map.size.x, current_map.size.y, current_map.tiles, current_map.size.x * sizeof(Uint16));
                 }
 
                 dragging_tile_change = false;