Fix null location

src/de/steamwar/towerrun/generator/TowerGenerator.java

@@ -50,6 +50,7 @@ public class TowerGenerator {
 
         this.config = config;
         allSchematics = SchematicNode.getAllSchematicsOfType(config.schematicType);
+        spawn = WorldConfig.SPAWN;
     }
 
     private Clipboard loadSchematic(File file) {