message: Fix zend string bug.
diff: @@ -897,7 +897,7 @@ static PHP_METHOD(swoole_table_row, offsetSet)
  if (col->type == SW_TABLE_STRING)
  {
  zend_string *str = zval_get_string(value);
  - swTableRow_set_value(row, col, Z_STRVAL_P(value), Z_STRLEN_P(value));
  + swTableRow_set_value(row, col, ZSTR_VAL(str), ZSTR_LEN(str));
  zend_string_release(str);
  }
  else if (col->type == SW_TABLE_FLOAT)
  