Fixed crash and evade mmaps

[Retriman]

Fixed Crash in getTileAt and prevent memory leak in instance thanks TC Users. Fix Evade System in mmaps system.

diff --git a/dep/recastlite/Detour/DetourNavMesh.cpp b/dep/recastlite/Detour/DetourNavMesh.cpp
index ca279b5..ea3cfeb 100644
--- a/dep/recastlite/Detour/DetourNavMesh.cpp
+++ b/dep/recastlite/Detour/DetourNavMesh.cpp
@@ -27,6 +27,14 @@
 #include "DetourAssert.h"
 #include <new>

+#ifdef _WIN32
+#include <io.h>
+#define F_OK   0
+#else
+#include <unistd.h>
+#endif
+#include <errno.h>
+

 inline bool overlapSlabs(const float* amin, const float* amax, const float* bmin, const float* bmax, const float px, const float py)
 {
@@ -817,11 +825,28 @@ dtStatus dtNavMesh::addTile(unsigned char* data, int dataSize, int flags, dtTile

 const dtMeshTile* dtNavMesh::getTileAt(int x, int y) const
 {
+    if ((x < -100000 || x > 100000) || (y < -100000 || y > 100000))
+        return 0;
+
     // Find tile based on hash.
-    int h = computeTileHash(x, y, m_tileLutMask);
+    int h = computeTileHash(x,y,m_tileLutMask);
+    access ((char*)(m_posLookup+h),F_OK);
+    if (errno==14)
+        return 0;   
     dtMeshTile* tile = m_posLookup[h];
+
     while (tile)
     {
+        if (sizeof(*tile)!=sizeof(dtMeshTile))
+            return 0;
+        if (sizeof(*tile->header)!=sizeof(dtMeshHeader))
+            return 0;
+        access ((char*)tile,F_OK);
+        if (errno==14)
+            return 0;
+        access ((char*)tile->header,F_OK);
+        if (errno==14)
+            return 0;
         if (tile->header && tile->header->x == x && tile->header->y == y)
             return tile;
         tile = tile->next;
diff --git a/src/server/game/Maps/Map.cpp b/src/server/game/Maps/Map.cpp
index 8962cf7..fd792c8 100755
--- a/src/server/game/Maps/Map.cpp
+++ b/src/server/game/Maps/Map.cpp
@@ -71,7 +71,6 @@ Map::~Map()
     if (!m_scriptSchedule.empty())
         sScriptMgr->DecreaseScheduledScriptCount(m_scriptSchedule.size());

-    MMAP::MMapFactory::createOrGetMMapManager()->unloadMap(GetId());
     MMAP::MMapFactory::createOrGetMMapManager()->unloadMapInstance(GetId(), i_InstanceId);
 }

diff --git a/src/server/game/Movement/MovementGenerators/TargetedMovementGenerator.cpp b/src/server/game/Movement/MovementGenerators/TargetedMovementGenerator.cpp
index 9d49e49..3c63487 100755
--- a/src/server/game/Movement/MovementGenerators/TargetedMovementGenerator.cpp
+++ b/src/server/game/Movement/MovementGenerators/TargetedMovementGenerator.cpp
@@ -215,6 +215,17 @@ template<class T>
 void ChaseMovementGenerator<T>::Finalize(T &owner)
 {
     owner.ClearUnitState(UNIT_STATE_CHASE | UNIT_STATE_CHASE_MOVE);
+
+    if (owner.GetTypeId() == TYPEID_UNIT && !((Creature*)&owner)->isPet() && owner.isAlive())
+       owner.GetMotionMaster()->MoveTargetedHome();
+   {
+       if (!owner.isInCombat() || ( this->i_target.getTarget() && !this->i_target.getTarget()->isInAccessiblePlaceFor(((Creature*)&owner))))
+       {
+           if (owner.isInCombat())
+               owner.CombatStop(true);
+           owner.GetMotionMaster()->MoveTargetedHome();
+       }
+   }
 }

 template<class T>