Log Message:
Update xmame to 0.97.

Release 0.97, 13 June 2005
- Everything from MAME 0.97 (http://x.mame.net/changes-mame.html) and
  MESS 0.97 (http://x.mame.net/changes-mess.html).
- When the emulation is unpaused, the keyboard state is cleared.  This
  prevents keypresses from bleeding over from the user interface.
- The SDL driver now uses the correct green mask for RGB 565.  This
  fixes a problem with SDL on DirectFB being unable to find a valid
  video mode.  (Uli H.)
- The SDL driver now locks the video surface before retrieving the
  pointer to its memory.  This fixes a crash with SDL on DirectFB.
  (Uli H.)
- Fixed a few spots in the code for 4.3 BSD, e.g., OpenStep on NeXT.
- Fixed bugs in the Xv driver and the 6-tap effect that affected
  big-endian architectures.  (Hans de Goede)