xtrans: fix #ifdef leading to undefined symbol SUN_LEN

We don't #define this macro (yet?).

x11-libs/xtrans/patches/xtrans-1.3.5.patchset

@@ -0,0 +1,37 @@
+From bd1da7692120fbfb13a2295abeb9b20d69291296 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Fran=C3=A7ois=20Revol?= <revol@free.fr>
+Date: Sun, 17 Jan 2016 15:50:52 +0100
+Subject: [PATCH] Xtranssock.c: Haiku has BSD UNIX socket but not SUN_LEN
+
+(yet?)
+
+The test seems quite incorrect and results in SUN_LEN as an undefined symbol on Haiku.
+---
+ Xtranssock.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/Xtranssock.c b/Xtranssock.c
+index d830e7c..f7c1637 100644
+--- a/Xtranssock.c
++++ b/Xtranssock.c
+@@ -1129,7 +1129,7 @@ TRANS(SocketUNIXCreateListener) (XtransConnInfo ciptr, const char *port,
+     sockname.sun_len = strlen(sockname.sun_path);
+ #endif
+ 
+-#if defined(BSD44SOCKETS) || defined(SUN_LEN)
++#if defined(BSD44SOCKETS) && defined(SUN_LEN)
+     namelen = SUN_LEN(&sockname);
+ #else
+     namelen = strlen(sockname.sun_path) + offsetof(struct sockaddr_un, sun_path);
+@@ -2003,7 +2003,7 @@ TRANS(SocketUNIXConnect) (XtransConnInfo ciptr,
+     sockname.sun_len = strlen (sockname.sun_path);
+ #endif
+ 
+-#if defined(BSD44SOCKETS) || defined(SUN_LEN)
++#if defined(BSD44SOCKETS) && defined(SUN_LEN)
+     namelen = SUN_LEN (&sockname);
+ #else
+     namelen = strlen (sockname.sun_path) + offsetof(struct sockaddr_un, sun_path);
+-- 
+2.7.0
+