Log Message:
Update xmess to 0.72.1.

Changes since 0.71.1 include:
- Everything from MAME 0.72 and MESS 0.72.
- The various effects enabled by -effect now work with rotation enabled.
  (Shyouzou Sugitani)
- The Xv target supports more effects.   (Shyouzou Sugitani)
- The rc parsing code displays more compact and readable error messages.
  (Andre Majorel)
- Xv windowed mode is now enabled with "-x11-mode 2" or "-x11 \ 
2", and
  Xv fullscreen mode is enabled with "-x11-mode 3" or "-x11 \ 
3".  The
  "-[no]xv" and "-fullscreen" switches are no longer available.
- Added hotkey switching for Xv windowed mode via ALT + DEL and Xv
  fullscreen mode via ALT + END.
- Added -widescreen for Xv.  This shrinks the width of the output for
  display on a widescreen TV.  (Per Wigren)