*Some clean up and add debug info to find the reason of crash.

--HG--
branch : trunk

src/game/SpellEffects.cpp

@@ -3488,6 +3488,7 @@ void Spell::EffectSummonType(uint32 i)
                         {
                             summon->SetUInt64Value(UNIT_FIELD_SUMMONEDBY, m_originalCaster->GetGUID());
                             summon->setFaction(m_originalCaster->getFaction());
+                            summon->SetUInt32Value(UNIT_CREATED_BY_SPELL, m_spellInfo->Id);
                         }
                     }
                     break;