Fix autoshot cannot attack a neutral target.

(based on cmangos/mangos-wotlk@e6a4a6323)

Signed-off-by: Xfurry <xfurry.cmangos@outlook.com>

src/game/Entities/Unit.cpp

@@ -4631,7 +4631,7 @@ void Unit::_UpdateAutoRepeatSpell()
         }
 
         // some check about new target are necessary
-        if (!currTarget || !currTarget->isTargetableForAttack() || currTarget->IsFriendlyTo(this))
+        if (!currTarget || !currTarget->isTargetableForAttack() || IsFriendlyTo(currTarget))
         {
             // no valid target
             InterruptSpell(CURRENT_AUTOREPEAT_SPELL);