[8295] Remove single target auras at caster/target shift to not accessable phase.

This must fix another source of "Couldn't find the caster of the single target aura" errors.

src/game/Unit.cpp

@@ -3878,13 +3878,24 @@ void Unit::RemoveAurasWithInterruptFlags(uint32 flags)
     }
 }
 
-void Unit::RemoveNotOwnSingleTargetAuras()
+void Unit::RemoveNotOwnSingleTargetAuras(uint32 newPhase)
 {
     // single target auras from other casters
     for (AuraMap::iterator iter = m_Auras.begin(); iter != m_Auras.end(); )
     {
         if (iter->second->GetCasterGUID()!=GetGUID() && IsSingleTargetSpell(iter->second->GetSpellProto()))
-            RemoveAura(iter);
+        {
+            if(!newPhase)
+                RemoveAura(iter);
+            else
+            {
+                Unit* caster = iter->second->GetCaster();
+                if(!caster || !caster->InSamePhase(newPhase))
+                    RemoveAura(iter);
+                else
+                    ++iter;
+            }
+        }
         else
             ++iter;
     }
@@ -3894,7 +3905,7 @@ void Unit::RemoveNotOwnSingleTargetAuras()
     for (AuraList::iterator iter = scAuras.begin(); iter != scAuras.end(); )
     {
         Aura* aura = *iter;
-        if (aura->GetTarget() != this)
+        if (aura->GetTarget() != this && !aura->GetTarget()->InSamePhase(newPhase))
         {
             scAuras.erase(iter);                            // explicitly remove, instead waiting remove in RemoveAura
             aura->GetTarget()->RemoveAura(aura);
@@ -11823,6 +11834,12 @@ void Unit::RemoveAurasAtChanneledTarget(SpellEntry const* spellInfo)
 
 void Unit::SetPhaseMask(uint32 newPhaseMask, bool update)
 {
+    if(newPhaseMask==GetPhaseMask())
+        return;
+
+    if(IsInWorld())
+        RemoveNotOwnSingleTargetAuras(newPhaseMask);        // we can lost access to caster or target
+
     WorldObject::SetPhaseMask(newPhaseMask,update);
 
     if(IsInWorld())

src/game/Unit.h

@@ -1209,7 +1209,7 @@ class MANGOS_DLL_SPEC Unit : public WorldObject
         void RemoveAurasDueToSpellBySteal(uint32 spellId, uint64 casterGUID, Unit *stealer);
         void RemoveAurasDueToSpellByCancel(uint32 spellId);
         void RemoveAurasAtChanneledTarget(SpellEntry const* spellInfo);
-        void RemoveNotOwnSingleTargetAuras();
+        void RemoveNotOwnSingleTargetAuras(uint32 newPhase = 0x0);
 
         void RemoveSpellsCausingAura(AuraType auraType);
         void RemoveRankAurasDueToSpell(uint32 spellId);

src/shared/revision_nr.h

@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "8294"
+ #define REVISION_NR "8295"
 #endif // __REVISION_NR_H__