[Spells] Update SPA158 Reflect (#1590)

* update

* updates

* updates

* update

* update

* Update ruletypes.h

* Apply extra spell dmg

Mob with the reflect effect apply its Extra Spell Damage from item stat to the reflected spell.
Updated portion of formula for extra damage based on live parsing.

* correct formula

zone/special_attacks.cpp

@@ -2043,7 +2043,7 @@ void Mob::InstillDoubt(Mob *who) {
 		//temporary hack...
 		//cast fear on them... should prolly be a different spell
 		//and should be un-resistable.
-		SpellOnTarget(229, who, false, true, -2000);
+		SpellOnTarget(229, who, 0, true, -2000);
 		//is there a success message?
 	} else {
 		MessageString(Chat::LightBlue,NOT_SCARING);