Core: Remove "enumeration value 'xxx' not handled in switch" warnings

--HG--
branch : trunk

src/server/game/AI/ScriptedAI/ScriptedCreature.cpp

@@ -599,6 +599,8 @@ bool BossAI::CheckBoundary(Unit *who)
                 if (me->GetPositionX() - me->GetPositionY() < itr->second)
                     return false;
                 break;
+            default:
+                break;
         }
     }
 

src/server/game/AI/ScriptedAI/ScriptedCreature.h

@@ -188,6 +188,8 @@ struct ScriptedAI : public CreatureAI
             return normal5;
         case DUNGEON_DIFFICULTY_HEROIC:
             return heroic10;
+        default:
+            break;
         }
 
         return heroic10;
@@ -202,6 +204,8 @@ struct ScriptedAI : public CreatureAI
             return normal10;
         case RAID_DIFFICULTY_25MAN_NORMAL:
             return normal25;
+        default:
+            break;
         }
 
         return normal25;