applied patch from Olli Savia for LynxOS Daniel

* libxml.h triodef.h: applied patch from Olli Savia for LynxOS
Daniel
diff --git a/triodef.h b/triodef.h
index 0fd32fb..fa89416 100644
--- a/triodef.h
+++ b/triodef.h
@@ -56,6 +56,8 @@
 # define TRIO_PLATFORM_UNIX
 #elif defined(__NetBSD__)
 # define TRIO_PLATFORM_UNIX
+#elif defined(__Lynx__)
+# define TRIO_PLATFORM_UNIX
 #elif defined(__QNX__)
 # define TRIO_PLATFORM_UNIX
 # define TRIO_PLATFORM_QNX