[ox/std] Add null check for deallocating in consteval context Vector

deps/ox/src/ox/std/vector.hpp

@@ -87,7 +87,9 @@ struct VectorAllocator {
 		constexpr void deallocate(T *items, std::size_t cap) noexcept {
 			// small vector optimization cannot be done it constexpr, but it doesn't really matter in constexpr
 			if (std::is_constant_evaluated()) {
+				if (items) {
 					Allocator{}.deallocate(items, cap);
+				}
 			} else {
 				if (items && static_cast<void*>(items) != static_cast<void*>(m_data.data())) {
 					Allocator{}.deallocate(items, cap);