CSpell: !isMagical() -> no sorcery and no generic spell dmg reduction

Other bonus are still applied.

lib/mapObjects/CGHeroInstance.cpp

@@ -603,7 +603,9 @@ int64_t CGHeroInstance::getSpellBonus(const spells::Spell * spell, int64_t base,
 {
 	//applying sorcery secondary skill
 
-	base = static_cast<int64_t>(base * (valOfBonuses(Bonus::SPELL_DAMAGE)) / 100.0);
+	if(spell->isMagical())
+		base = static_cast<int64_t>(base * (valOfBonuses(Bonus::SPELL_DAMAGE)) / 100.0);
+
 	base = static_cast<int64_t>(base * (100 + valOfBonuses(Bonus::SPECIFIC_SPELL_DAMAGE, spell->getIndex())) / 100.0);
 
 	int maxSchoolBonus = 0;

lib/spells/CSpellHandler.cpp

@@ -403,8 +403,8 @@ int64_t CSpell::adjustRawDamage(const spells::Caster * caster, const battle::Uni
 
 		CSelector selector = Selector::type()(Bonus::SPELL_DAMAGE_REDUCTION).And(Selector::subtype()(-1));
 
-		//general spell dmg reduction
-		if(bearer->hasBonus(selector))
+		//general spell dmg reduction, works only on magical effects
+		if(bearer->hasBonus(selector) && isMagical())
 		{
 			ret *= 100 - bearer->valOfBonuses(selector);
 			ret /= 100;