Eluna fix (c)mangos build for mthread changes

LuaEngine.h

@@ -32,6 +32,8 @@ typedef BattlegroundTypeId BattleGroundTypeId;
 struct ItemPrototype;
 typedef ItemPrototype ItemTemplate;
 typedef SpellEffectIndex SpellEffIndex;
+struct SpellEntry;
+typedef SpellEntry SpellInfo;
 #ifdef CLASSIC
 typedef int Difficulty;
 #endif

MapMethods.h

@@ -97,6 +97,7 @@ namespace LuaMap
 
     /**
      * Returns the height of the [Map] at the given X and Y coordinates
+     * In case of no height found nil is returned
      *
      * @param float x
      * @param float y