PDO: Migrate maxlen of pdo_column_data from size_t to zend_long

ext/pdo/pdo_stmt.c

@@ -1590,7 +1590,7 @@ PHP_METHOD(PDOStatement, getColumnMeta)
 	/* add stock items */
 	col = &stmt->columns[colno];
 	add_assoc_str(return_value, "name", zend_string_copy(col->name));
-	add_assoc_long(return_value, "len", col->maxlen); /* FIXME: unsigned ? */
+	add_assoc_long(return_value, "len", col->maxlen);
 	add_assoc_long(return_value, "precision", col->precision);
 }
 /* }}} */

ext/pdo/php_pdo_driver.h

@@ -533,7 +533,7 @@ static inline pdo_dbh_object_t *php_pdo_dbh_fetch_object(zend_object *obj) {
 /* describes a column */
 struct pdo_column_data {
 	zend_string *name;
-	size_t maxlen;
+	zend_long maxlen;
 	zend_ulong precision;
 };
 

ext/pdo_sqlite/sqlite_statement.c

@@ -251,7 +251,7 @@ static int pdo_sqlite_stmt_describe(pdo_stmt_t *stmt, int colno)
 
 	str = sqlite3_column_name(S->stmt, colno);
 	stmt->columns[colno].name = zend_string_init(str, strlen(str), 0);
-	stmt->columns[colno].maxlen = SIZE_MAX;
+	stmt->columns[colno].maxlen = -1;
 	stmt->columns[colno].precision = 0;
 
 	return 1;