Core/Scripts: Added enum for generic script texts, fixed one broken text

Scripts/Icecrown Citadel: Blood-Queen Lana'Thel will no longer spawn for Blood Princes intro if they were already killed

--HG--
branch : trunk

src/server/game/Scripting/ScriptMgr.h

@@ -66,7 +66,6 @@ struct ItemPrototype;
 struct OutdoorPvPData;
 
 #define VISIBLE_RANGE       (166.0f)                        //MAX visible range (size of grid)
-#define DEFAULT_TEXT        "<Trinity Script Text Entry Missing!>"
 
 // Generic scripting text function.
 void DoScriptText(int32 textEntry, WorldObject* pSource, Unit *pTarget = NULL);