Core: Cleanup locale handling.

It also fixes the recent problem of strange strings.

--HG--
branch : trunk

src/server/game/Entities/GameObject/GameObject.h

@@ -622,7 +622,7 @@ class GameObject : public WorldObject, public GridObject<GameObject>
         void YellToZone(int32 textId, uint32 language, uint64 TargetGuid) { MonsterYellToZone(textId,language,TargetGuid); }
 
         // overwrite WorldObject function for proper name localization
-        const char* GetNameForLocaleIdx(int32 locale_idx) const;
+        const char* GetNameForLocaleIdx(LocaleConstant locale_idx) const;
 
         void SaveToDB();
         void SaveToDB(uint32 mapid, uint8 spawnMask, uint32 phaseMask);