Fix d leak in ecc openssl_pkey_new

Author: nikic

ext/openssl/openssl.c

@@ -4370,7 +4370,7 @@ PHP_FUNCTION(openssl_pkey_new)
 			EC_KEY *eckey = NULL;
 			EC_GROUP *group = NULL;
 			EC_POINT *pnt = NULL;
-			const BIGNUM *d;
+			BIGNUM *d = NULL;
 			pkey = EVP_PKEY_new();
 			if (pkey) {
 				eckey = EC_KEY_new();
@@ -4418,6 +4418,8 @@ PHP_FUNCTION(openssl_pkey_new)
 							php_openssl_store_errors();
 							goto clean_exit;
 						}
+
+						BN_free(d);
 					} else if ((x = zend_hash_str_find(Z_ARRVAL_P(data), "x", sizeof("x") - 1)) != NULL &&
 							Z_TYPE_P(x) == IS_STRING &&
 							(y = zend_hash_str_find(Z_ARRVAL_P(data), "y", sizeof("y") - 1)) != NULL &&
@@ -4462,6 +4464,9 @@ PHP_FUNCTION(openssl_pkey_new)
 				php_openssl_store_errors();
 			}
 clean_exit:
+			if (d != NULL) {
+				BN_free(d);
+			}
 			if (pnt != NULL) {
 				EC_POINT_free(pnt);
 			}