[Sbcl-devel] Minor fixes for Win32

[Kalyanov D. <kal...@gm...>]

I'm attaching several trivial patches:

1) run-sbcl.sh doesn't work on cygwin since it passes to sbcl unix-like paths 
obtained with readlink, not win32 paths. The patch changes adds check for 
Cygwin and converts path to win32 path.

2) contribs makefile uses "gcc" as the compiler name; if cygwin has gcc 4.x 
installed then gcc is linked to gcc-4, but gcc 4.x doesn't accept -mno-cygwin 
key. The patch changes makefile to use "gcc-3" compiler.

3) HANDLE-LISTEN calls PeekConsoleInput Win32 function and passes as the third 
argument the size of array in bytes. But it should pass size of array in 
elements (http://msdn.microsoft.com/en-us/library/ms684344%28VS.85%29.aspx). 
This results in stack overwriting. The patch changes HANDLE-LISTEN to pass in 
1 instead of INPUT-RECORD-SIZE.