SD example issue

[fpistm]

With Full.ino example, this fail:

  /* Test isDirectory() method */
  MyFile = File("STM32");
  if (MyFile) {
    Serial.print("Is 'STM32' is a dir: ");
    if (MyFile.isDirectory())
      Serial.println("OK");
    else
      Serial.println("KO");
  } else {
    Serial.println("Error to open 'STM32' dir");
  }

With listfiles.ino example, after rewindDirectory() the printDirectory() is not fully displayed.