wxwindows update for WIN32 wxSpinCtrl, restrict range to valid integer (-32768, 32767)

[vlc] / python / vlrs / sample-playlist

rtsp://hostname.domain.org:1554/film1   /opt/media/film1.mpg    A sample stream file    239.255.12.42
rtsp://hostname.domain.org:1554/film2   /opt/media/film2.mpg    Another stream  239.255.42.12