Correct cast style behavior when there's no object (bug #5075)

CHANGELOG.md

@@ -105,6 +105,7 @@
     Bug #5060: Magic effect visuals stop when death animation begins instead of when it ends
     Bug #5063: Shape named "Tri Shadow" in creature mesh is visible if it isn't hidden
     Bug #5069: Blocking creatures' attacks doesn't degrade shields
+    Bug #5075: Enchanting cast style can be changed if there's no object
     Feature #1774: Handle AvoidNode
     Feature #2229: Improve pathfinding AI
     Feature #3025: Analogue gamepad movement controls

apps/openmw/mwmechanics/enchanting.cpp

@@ -102,10 +102,7 @@ namespace MWMechanics
     void Enchanting::nextCastStyle()
     {
         if (itemEmpty())
-        {
-            mCastStyle = ESM::Enchantment::WhenUsed;
             return;
-        }
 
         const bool powerfulSoul = getGemCharge() >= \
                 MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find ("iSoulAmountForConstantEffect")->mValue.getInteger();
@@ -267,6 +264,8 @@ namespace MWMechanics
     void Enchanting::setEnchanter(const MWWorld::Ptr& enchanter)
     {
         mEnchanter = enchanter;
+        // Reset cast style
+        mCastStyle = ESM::Enchantment::CastOnce;
     }
 
     int Enchanting::getEnchantChance() const