Core/Player: Fix teleporting FlyPath dismounting the player

Issue added in 72fc79a9e63d77754699a3da90d81219b2defb0d

(cherry picked from commit 4019cae375838e3bc653936fb9705d8df57ca571)

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

@@ -1369,7 +1369,8 @@ bool Player::TeleportTo(uint32 mapid, float x, float y, float z, float orientati
     SetUnitMovementFlags(GetUnitMovementFlags() & MOVEMENTFLAG_MASK_HAS_PLAYER_STATUS_OPCODE);
     m_movementInfo.ResetJump();
     DisableSpline();
-    GetMotionMaster()->Clear();
+    if (!IsInFlight())
+        GetMotionMaster()->Clear();
 
     if (Transport* transport = GetTransport())
     {