Fix another uninitialized value in Player::m_AreaID

Thanks to ge0rg and his valgrinding (again)

--HG--
branch : trunk

src/server/game/Entities/Player/Player.cpp

@@ -575,6 +575,8 @@ Player::Player (WorldSession *session): Unit(), m_achievementMgr(this), m_reputa
     //Default movement to run mode
     //m_unit_movement_flags = 0;
 
+    m_AreaID = 0;
+
     m_mover = this;
     m_movedPlayer = this;
     m_seer = this;