Do not allow base map be accessed from outside if map is instanceable.

src/server/game/Maps/MapManager.cpp

@@ -119,6 +119,14 @@ Map* MapManager::CreateBaseMap(uint32 id)
     return m;
 }
 
+Map* MapManager::FindBaseNonInstanceMap(uint32 mapId) const
+{
+    Map* map = FindBaseMap(mapId);
+    if(map && map->Instanceable())
+        return NULL;
+    return map;
+}
+
 Map* MapManager::CreateMap(uint32 id, Player* player)
 {
     Map* m = CreateBaseMap(id);

src/server/game/Maps/MapManager.h

@@ -36,11 +36,7 @@ class MapManager
 
     public:
         Map* CreateBaseMap(uint32 mapId);
-        Map* FindBaseMap(uint32 mapId) const
-        {
-            MapMapType::const_iterator iter = i_maps.find(mapId);
-            return (iter == i_maps.end() ? NULL : iter->second);
-        }
+        Map* FindBaseNonInstanceMap(uint32 mapId) const;
         Map* CreateMap(uint32 mapId, Player* player);
         Map* FindMap(uint32 mapId, uint32 instanceId) const;
 
@@ -164,6 +160,12 @@ class MapManager
         MapManager();
         ~MapManager();
 
+        Map* FindBaseMap(uint32 mapId) const
+        {
+            MapMapType::const_iterator iter = i_maps.find(mapId);
+            return (iter == i_maps.end() ? NULL : iter->second);
+        }
+
         MapManager(const MapManager &);
         MapManager& operator=(const MapManager &);