[ox/fs] Fix PassthroughFS mkdir for recursive cases

(synced from 7d95dbaa99)

src/ox/fs/filesystem/passthroughfs.cpp

@@ -35,8 +35,7 @@ Error PassThroughFS::mkdir(const char *path, bool recursive) noexcept {
 	if (recursive) {
 		std::error_code ec;
 		const auto isDir = std::filesystem::is_directory(p, ec);
-		oxReturnError(OxError(ec.value(), "PassThroughFS: mkdir failed"));
-		if (isDir) {
+		if (isDir && !ec.value()) {
 			success = true;
 		} else {
 			success = std::filesystem::create_directories(p, ec);