Fixes ItemLibrary compilation error in GCC.

src/Library/Items/ItemLibrary.hpp

@@ -8,7 +8,9 @@ namespace PkmnLib::Library {
     public:
         inline std::optional<ArbUt::BorrowedPtr<const Item>> TryGet(const ArbUt::BasicStringView& name) const {
             auto res = CreatureLib::Library::ItemLibrary::TryGet(name.GetHash());
-            return reinterpret_cast<const std::optional<ArbUt::BorrowedPtr<const Item>>&>(res);
+            if (!res.has_value())
+                return {};
+            return res.value().ForceAs<const Item>();
         }
 
         inline ArbUt::BorrowedPtr<const Item> Get(const ArbUt::BasicStringView& name) const {