Makefile: add comment on CYGWIN_V15_WIN32API

diff --git a/vcs-svn/sliding_window.c b/vcs-svn/sliding_window.c
index ec2707c9c421424a8b34f456aa7472c4c0f45559..f11d490995ee7e3367c1d18e1058f2e322cfa177 100644 (file)
--- a/vcs-svn/sliding_window.c
+++ b/vcs-svn/sliding_window.c
@@ -54,7 +54,7 @@ int move_window(struct sliding_view *view, off_t off, size_t width)
                return -1;
        if (off < view->off || off + width < view->off + view->width)
                return error("invalid delta: window slides left");
-       if (view->max_off >= 0 && view->max_off < off + width)
+       if (view->max_off >= 0 && view->max_off < off + (off_t) width)
                return error("delta preimage ends early");
 
        file_offset = view->off + view->buf.len;