Reduce usable tile area

Fix DynamicRegionVisualizer throwing exceptions

BauSystem/BauSystem_RegionDynamic/src/de/steamwar/bausystem/region/DynamicRegionSystem.java

@@ -88,6 +88,14 @@ public class DynamicRegionSystem implements RegionSystem {
                 .collect(Collectors.toUnmodifiableMap(entry -> entry.getValue().identifier(), Map.Entry::getKey));
 
         DynamicRegionRepository.loadRegions();
+        // [STDOUT] PATH 239
+        // [STDOUT] DRY 4
+        // [STDOUT] DRY_SPECIAL 18
+        // [STDOUT] WET 2
+        // [STDOUT] WET_SPECIAL 9
+        regionTypeMap.forEach((type, regions) -> {
+            System.out.println(type + " " + regions.size());
+        });
         new DynamicRegionCommand();
         new WireframeCommand();
     }
@@ -109,9 +117,10 @@ public class DynamicRegionSystem implements RegionSystem {
         Set<Tile> tiles = new HashSet<>();
         for (int x = minPoint.getX(); x < maxPoint.getX(); x += Tile.tileSize) {
             for (int z = minPoint.getZ(); z < maxPoint.getZ(); z += Tile.tileSize) {
-                tiles.add(Tile.fromXZ(x, z).orElseThrow());
+                tiles.add(Tile.fromXZ(x, z).orElse(null));
             }
         }
+        tiles.remove(null);
         return Collections.unmodifiableSet(tiles);
     }