LibJS: Convert StringObject::create() to NonnullGCPtr

Author: https://github.com/linusg
Commit: 049e99b5f0
Pull-request: https://github.com/SerenityOS/serenity/pull/16479
Reviewed-by: https://github.com/davidot ✅

Userland/Libraries/LibJS/Runtime/Value.cpp

@@ -540,7 +540,7 @@ ThrowCompletionOr<Object*> Value::to_object(VM& vm) const
     // String
     case STRING_TAG:
         // Return a new String object whose [[StringData]] internal slot is set to argument. See 22.1 for a description of String objects.
-        return StringObject::create(realm, const_cast<JS::PrimitiveString&>(as_string()), *realm.intrinsics().string_prototype());
+        return StringObject::create(realm, const_cast<JS::PrimitiveString&>(as_string()), *realm.intrinsics().string_prototype()).ptr();
     // Symbol
     case SYMBOL_TAG:
         // Return a new Symbol object whose [[SymbolData]] internal slot is set to argument. See 20.4 for a description of Symbol objects.