[9850] Fixed target selection for area spells casted from aura at enemy.

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m src/game/GridNotifiers.h

m src/game/Spell.cpp

m src/game/Spell.h

m src/shared/revision_nr.h



[9850] Fixed target selection for area spells casted from aura at enemy.



* Spell::GetCastingObject must be use for selection visual/point cast,

  not for friend/enemy checks. Add extanded GetAffectiveCasterObject

  for proper provide for referecned checks wild gameobject casted case.



* Also support chain damage spells casted by gameobjects.

Дальше...