fixed a hiddenRooms bug caused by newer versions of tiled

src/server/world/map.js

@@ -327,8 +327,9 @@ module.exports = {
 			}
 		},
 		object: function (layerName, cell) {
-			//Fix for newer versions of tiled
+			//Fixes for newer versions of tiled
 			cell.properties = objectifyProperties(cell.properties);
+			cell.polyline = cell.polygon;
 
 			let clientObj = (layerName === 'clientObjects');
 			let cellInfo = this.builders.getCellInfo(cell.gid);