[ox/std] Fix UPtr compare with nullptr

(synced from f01d303381)

src/ox/std/memory.hpp

@@ -260,12 +260,12 @@ constexpr bool operator==(const UniquePtr<T> &p1, const UniquePtr<T> &p2) noexce
 
 template<typename T>
 constexpr bool operator==(const UniquePtr<T> &p1, std::nullptr_t) noexcept {
-	return p1.get();
+	return p1.get() == nullptr;
 }
 
 template<typename T>
 constexpr bool operator==(std::nullptr_t, const UniquePtr<T> &p2) noexcept {
-	return p2.get();
+	return p2.get() == nullptr;
 }