[php-src] Issue #9339: OpenSSL oid_file path check contains uninitialized path

Issue: https://github.com/php/php-src/issues/9339 Author: bukka ### Description Due to bug in the error message creation that is used in oid_file check, the uninitialized real_path is printed. It doesn't really make much sense to print the path as the invalid one is either too long or contains \0 character The following code: ```php <?php $configFile = __DIR__ . '/custom.cnf'; file_put_contents($configFile, sprintf("oid_file = %s\n", __DIR__ . '/' . str_repeat('a', 9000))); $pkey = openssl_pkey_new([ 'config' => $configFile ]); ``` Resulted in this output: ``` PHP Warning: openssl_pkey_new(): Path '�h,�' for oid_file option must be a valid file path in ... ``` But I expected this output instead: ``` PHP Warning: openssl_pkey_new(): Path for oid_file option must be a valid file path in ... ``` ### PHP Version PHP 8.0 ### Operating System Linux