python-scripts: get_av_settings.py uses wrong flags

[JayFoxRox]

Code contains this:

  mode = val & 0x000E0000
  if (mode & 0x00010000):
    print("  HDTV 480i")

but also this:

  if val & 0x00010000:
    print("  Widescreen")

Both of them check val & 0x00010000, although it's not even reachable in the mode variable, as that particular bit was masked. Therefore, it is assumed that the resolution field is bad.