Core: Fix some warnings:

- enumeration value ‘X’ not handled in switch
- unused parameter 'X'

--HG--
branch : trunk

src/server/game/Chat/Commands/Level3.cpp

@@ -5648,6 +5648,8 @@ bool ChatHandler::HandleBanCharacterCommand(const char *args)
             SetSentErrorMessage(true);
             return false;
         }
+        default:
+            break;
     }
 
     return true;