Set weapon Magical flag when enchanting a weapon

apps/openmw/mwclass/weapon.cpp

@@ -378,6 +378,7 @@ namespace MWClass
         newItem.mName=newName;
         newItem.mData.mEnchant=enchCharge;
         newItem.mEnchant=enchId;
+        newItem.mData.mFlags |= ESM::Weapon::Magical;
         const ESM::Weapon *record = MWBase::Environment::get().getWorld()->createRecord (newItem);
         return record->mId;
     }