ffap and windows drive letters

[Scott Otterson]

How can I get ffap to work with paths containing windows drive letters? 
Say I've got this path to an existing file in an emacs buffer

  d:\work\com\auto.cpp

If I put the cursor in the middle of "work" and type M-x ffap, the 
minibuffer will contain

  d:\work

rather than the full path to the file. If I put the cursor in the middle 
of "auto.cpp," the minibuffer will contain

  d:\

It looks to me like the function ffap-guesser in ffap.el needs to be 
fixed but I'm not sharp enough on elisp to do it.

Thanks,

Scott