[ptx] libpano12-cvs: make error under cygwin

[Bruno Postle]

On Tue 16-Nov-2004 at 09:41 +0200, Douglas Wilkins wrote:

> 1. sys_X11.h and sys_X11.c should not be compiled __at all__ on
> cygwin

Or anywhere else.  These files were never distributed with the
original sources, they appear to be part of an unfinished linux gui
for PTStitcher et al.

I found them in the mac sources along with the missing sys_ansi.h
file.  They are in CVS because I couldn't think what else to do with
them.

-- 
Bruno