tools/winemaker prints unexpected output

[Saulius Krasuckas]

Now I am running it on a latest GIT tree this way:

 $ tools/winapi/msvcmaker --no-wine
 .: searching for /^Makefile.in$/

And after a while it appends this string to the end of last line:

 readline() on closed filehandle IN at tools/winapi/msvcmaker line 134.

Maybe it doesn't indicate any harm, but in ideal world this should be 
fixed.  I don't know perl, unfortunately.