Mobbases can have empty mobflag values.

src/engine/Enum.java

@@ -37,6 +37,7 @@ import java.util.concurrent.ThreadLocalRandom;
 public class Enum {
 
 	public enum MobFlagType implements EnumBitSetHelper<MobFlagType> {
+		NONE,
 		AGGRESSIVE,
 		CANROAM,
 		CALLSFORHELP,