updated for version 7.3.687
Problem:    Test 16 fails when $DISPLAY is not set.
Solution:   Skip the test when $DISPLAY is not set.
diff --git a/src/version.c b/src/version.c
index ec61f9b..7be65c6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -720,6 +720,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    687,
+/**/
     686,
 /**/
     685,