Merge branch 'PHP-7.4' into PHP-8.0

* PHP-7.4:
  Handle errors during PDO row fetch

Author: nikic

ext/pdo_mysql/mysql_statement.c

@@ -666,11 +666,7 @@ static int pdo_mysql_stmt_fetch(pdo_stmt_t *stmt, enum pdo_fetch_orientation ori
 #endif /* PDO_USE_MYSQLND */
 
 	if ((S->current_data = mysql_fetch_row(S->result)) == NULL) {
-#ifdef PDO_USE_MYSQLND
-		if (S->result->unbuf && !S->result->unbuf->eof_reached && mysql_errno(S->H->server)) {
-#else
-		if (!S->result->eof && mysql_errno(S->H->server)) {
-#endif
+		if (!S->H->buffered && mysql_errno(S->H->server)) {
 			pdo_mysql_error_stmt(stmt);
 		}
 		PDO_DBG_RETURN(0);