expand_wild different behaviour on NT & cygwin

[Jim Hyslop]

While tracking down the "watch add" bug I started working on in 
February, I noticed an inconsistency with the behaviour of expand_wild() 
between the Cygwin version, and the Visual Studio version.

If you call expand_wild() and pass it "." as an argument, the Visual 
Studio version converts it to the current directory name (i.e. if the 
current directory is c:\some_path\directory\, "." becomes "directory"). 
Under cygwin, it remains as "."

Which is the correct and expected behaviour? I suspect it's cygwin, but 
I'd like to make sure before I submit any patches.

--
Jim