Core: Fix pet dismiss on phase with update

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

@@ -16378,19 +16378,25 @@ void Unit::SetPhaseMask(uint32 newPhaseMask, bool update)
         }
     }
 
-    WorldObject::SetPhaseMask(newPhaseMask, update);
+    // Phase player, dont update
+    WorldObject::SetPhaseMask(newPhaseMask, false);
 
-    if (!IsInWorld())
-        return;
+    // Phase pets and summons
+    if (IsInWorld())
+    {
+        for (ControlList::const_iterator itr = m_Controlled.begin(); itr != m_Controlled.end(); ++itr)
+            if ((*itr)->GetTypeId() == TYPEID_UNIT)
+                (*itr)->SetPhaseMask(newPhaseMask, true);
 
-    for (ControlList::const_iterator itr = m_Controlled.begin(); itr != m_Controlled.end(); ++itr)
-        if ((*itr)->GetTypeId() == TYPEID_UNIT)
-            (*itr)->SetPhaseMask(newPhaseMask, true);
+        for (uint8 i = 0; i < MAX_SUMMON_SLOT; ++i)
+            if (m_SummonSlot[i])
+                if (Creature* summon = GetMap()->GetCreature(m_SummonSlot[i]))
+                    summon->SetPhaseMask(newPhaseMask, true);
+    }
 
-    for (uint8 i = 0; i < MAX_SUMMON_SLOT; ++i)
-        if (m_SummonSlot[i])
-            if (Creature* summon = GetMap()->GetCreature(m_SummonSlot[i]))
-                summon->SetPhaseMask(newPhaseMask, true);
+    // Update visibility after phasing pets and summons so they wont despawn
+    if (update)
+        UpdateObjectVisibility();
 }
 
 void Unit::UpdateObjectVisibility(bool forced)