Simplify Region.hasType

BauSystem_Main/src/de/steamwar/bausystem/region/Region.java

@@ -204,6 +204,9 @@ public class Region {
         if (prototype == null) {
             return false;
         }
+        if (regionType == null) {
+            return false;
+        }
         switch (regionType) {
             case BUILD:
                 return prototype.getBuild() != null;