Pull 20081216 interim patch from http://www.gregroelofs.com/greg_xv.html

Bump PKGREVISION.

Changelog noted in the upstream homepage:

* 20070621: fixed improper ClearCode termination condition in GIF
  decoder (JZ); cleaned up xvgif.c debug info (GRR); fixed some
  minor inconsistencies in Makefile (GRR)
* xv-20070621-joe-zbiciak-gif-decoder-bugfix.dif
* 20070901 [possibly temporary!]: added support for optional libpng
  MMX code (GRR)
* 20080121: removed duplicate "XDestroyWindow(theDisp, pngW);" in
  xvmisc.c (IMC); fixed empty-filename click-and-crash bug in xvdir.c
  (IMC, DB)
* xv-20080118-ian-collier-crash-fixes.msg
* xv-20080901-david-bath-empty-filename-save-crash-fix.dif
* 20081205: reverted xvxwd.c to SJT's version (bug reported by Jari Ruusu)
* 20081216: fixed crash-bug in IFF decoder (EP)

(tsutsui)