Core/Game: Include cleanup part 5

* ObjectMgr.h
* Player.h
* Unit.h
* G3D should no longer propagate everywhere from Spline/MotionMaster

src/server/game/Maps/MapReference.cpp

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2008-2017 TrinityCore <http://www.trinitycore.org/>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "MapReference.h"
+#include "Map.h"
+
+void MapReference::targetObjectBuildLink()
+{
+    // called from link()
+    getTarget()->m_mapRefManager.insertFirst(this);
+    getTarget()->m_mapRefManager.incSize();
+}
+
+void MapReference::targetObjectDestroyLink()
+{
+    // called from unlink()
+    if (isValid())
+        getTarget()->m_mapRefManager.decSize();
+}
+
+void MapReference::sourceObjectDestroyLink()
+{
+    // called from invalidate()
+    getTarget()->m_mapRefManager.decSize();
+}