message: fix invalid read 1 byte
diff: @@ -155,7 +155,7 @@ static sw_inline void http_client_create_token(int length, char *buf)
  assert(length < 1024);
  for (i = 0; i < length; i++)
  {
  - buf[i] = characters[rand() % sizeof(characters) - 1];
  + buf[i] = characters[rand() % (sizeof(characters) - 1)];
  }
  buf[length] = '\0';
  }
  