Core/Creatures: Remove hover on death

(cherry picked from commit 241109327bf573460d488d707d7eb19f82f1350c)

src/server/game/Entities/Creature/Creature.cpp

@@ -2140,7 +2140,10 @@ void Creature::setDeathState(DeathState s)
         if (m_formation && m_formation->GetLeader() == this)
             m_formation->FormationReset(true);
 
-        if ((CanFly() || IsFlying()))
+        bool needsFalling = IsFlying() || IsHovering();
+        SetHover(false);
+
+        if (needsFalling)
             GetMotionMaster()->MoveFall();
 
         Unit::setDeathState(CORPSE);
@@ -3150,7 +3153,7 @@ void Creature::UpdateMovementFlags()
     {
         SetCanFly(false);
         SetDisableGravity(false);
-        if (CanHover() || HasAuraType(SPELL_AURA_HOVER))
+        if (IsAlive() && (CanHover() || HasAuraType(SPELL_AURA_HOVER)))
             SetHover(true);
     }
 

src/server/game/Entities/Unit/Unit.cpp

@@ -13532,7 +13532,8 @@ bool Unit::SetHover(bool enable)
     else
     {
         RemoveUnitMovementFlag(MOVEMENTFLAG_HOVER);
-        if (hoverHeight)
+        //! Dying creatures will MoveFall from setDeathState
+        if (hoverHeight && (!isDying() || GetTypeId() != TYPEID_UNIT))
         {
             float newZ = GetPositionZ() - hoverHeight;
             UpdateAllowedPositionZ(GetPositionX(), GetPositionY(), newZ);

src/server/game/Globals/ObjectMgr.cpp

@@ -456,11 +456,15 @@ void ObjectMgr::LoadCreatureTemplate(Field* fields)
     if (!fields[60].IsNull())
         creatureTemplate.Movement.Ground = static_cast<CreatureGroundMovementType>(fields[60].GetUInt8());
 
-    creatureTemplate.Movement.Swim = fields[61].GetBool();
+    if (!fields[61].IsNull())
+        creatureTemplate.Movement.Swim = fields[61].GetBool();
+
     if (!fields[62].IsNull())
         creatureTemplate.Movement.Flight = static_cast<CreatureFlightMovementType>(fields[62].GetUInt8());
 
-    creatureTemplate.Movement.Rooted        = fields[63].GetBool();
+    if (!fields[63].IsNull())
+        creatureTemplate.Movement.Rooted = fields[63].GetBool();
+
     creatureTemplate.HoverHeight            = fields[64].GetFloat();
     creatureTemplate.ModHealth              = fields[65].GetFloat();
     creatureTemplate.ModHealthExtra         = fields[66].GetFloat();

src/server/scripts/Northrend/CrusadersColiseum/TrialOfTheCrusader/boss_twin_valkyr.cpp

@@ -228,7 +228,6 @@ struct boss_twin_baseAI : public BossAI
     void JustDied(Unit* /*killer*/) override
     {
         Talk(SAY_DEATH);
-        me->SetHover(false);
         if (Creature* pSister = GetSister())
         {
             if (!pSister->IsAlive())