[21.5] Avoid using Motif for cygwin

[Dr. Volker Zell]

2006-12-06  Dr. Volker Zell  <Dr.Volker.Zell at oracle.com>

	* configure.ac: Avoid using Motif for cygwin.
	
--- configure.ac.orig	2006-12-06 11:17:49.081171200 +0100
+++ configure.ac	2006-12-06 11:25:31.135572800 +0100
@@ -4310,7 +4310,7 @@
 
 dnl Avoid using Motif :-(
 case "$opsys" in
-  *linux* | *darwin* | *bsd* )  lucid_prefers_motif="no"  ;;
+  *linux* | *darwin* | *bsd* | *cygwin* )  lucid_prefers_motif="no"  ;;
   * )        lucid_prefers_motif="yes" ;;
 esac