updated for version 7.3.836
Problem:    Clipboard does not work on Win32 when compiled with Cygwin.
Solution:   Move the Win32 clipboard code to a separate file and use it when
            building with os_unix.c. (Frodak Baksik, Ken Takata)
diff --git a/src/term.c b/src/term.c
index a566132..6515f85 100644
--- a/src/term.c
+++ b/src/term.c
@@ -1853,7 +1853,9 @@
 #    ifdef FEAT_GUI
 	if (!gui.in_use)
 #    endif
+#    ifndef FEAT_CYGWIN_WIN32_CLIPBOARD
 	    clip_init(FALSE);
+#    endif
 #   endif
 	if (use_xterm_like_mouse(term))
 	{