Core/Creatures: Remove hover on death

Port From (https://github.com/TrinityCore/TrinityCore/commit/a91edcb9524b53f027a8ef8c247a443a9bb42f1e)

Source/Game/Entities/Creature/Creature.cs

@@ -1824,7 +1824,10 @@ namespace Game.Entities
                 if (m_formation != null && m_formation.GetLeader() == this)
                     m_formation.FormationReset(true);
 
-                if ((CanFly() || IsFlying()))
+                bool needsFalling = IsFlying() || IsHovering();
+                SetHover(false);
+
+                if (needsFalling)
                     GetMotionMaster().MoveFall();
 
                 base.SetDeathState(DeathState.Corpse);
@@ -2848,7 +2851,7 @@ namespace Game.Entities
             {
                 SetCanFly(false);
                 SetDisableGravity(false);
-                if (CanHover() || HasAuraType(AuraType.Hover))
+                if (IsAlive() && (CanHover() || HasAuraType(AuraType.Hover)))
                     SetHover(true);
             }
 

Source/Game/Entities/Creature/CreatureData.cs

@@ -362,12 +362,10 @@ namespace Game.Entities
             Rooted = false;
         }
 
-
-
-        bool IsGroundAllowed() { return Ground != CreatureGroundMovementType.None; }
-        bool IsSwimAllowed() { return Swim; }
-        bool IsFlightAllowed() { return Flight != CreatureFlightMovementType.None; }
-        bool IsRooted() { return Rooted; }
+        public bool IsGroundAllowed() { return Ground != CreatureGroundMovementType.None; }
+        public bool IsSwimAllowed() { return Swim; }
+        public bool IsFlightAllowed() { return Flight != CreatureFlightMovementType.None; }
+        public bool IsRooted() { return Rooted; }
 
         public override string ToString()
         {

Source/Game/Entities/Unit/Unit.Movement.cs

@@ -989,7 +989,9 @@ namespace Game.Entities
             else
             {
                 RemoveUnitMovementFlag(MovementFlag.Hover);
-                if (hoverHeight != 0)
+
+                //! Dying creatures will MoveFall from setDeathState
+                if (hoverHeight != 0 && (!IsDying() || !IsUnit()))
                 {
                     float newZ = GetPositionZ() - hoverHeight;
                     UpdateAllowedPositionZ(GetPositionX(), GetPositionY(), ref newZ);