Move pipe_notify_client_thread to end of rfbClientRec

in order to retain ABI compatibility.

rfb/rfb.h

@@ -465,7 +465,6 @@ typedef struct _rfbClientRec {
     int protocolMinorVersion;
 
 #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
-    int pipe_notify_client_thread[2];
     pthread_t client_thread;
 #endif
 
@@ -692,6 +691,9 @@ typedef struct _rfbClientRec {
     rfbSslCtx *sslctx;
     wsCtx     *wsctx;
     char *wspath;                          /* Requests path component */
+#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
+    int pipe_notify_client_thread[2];
+#endif
 } rfbClientRec, *rfbClientPtr;
 
 /**