patch 7.4.2068
Problem:    Not all arguments of trunc_string() are tested.  Memory access
            error when running the message tests.
Solution:   Add another test case. (Yegappan Lakshmanan)  Make it easy to run
            unittests with valgrind.  Fix the access error.
diff --git a/src/version.c b/src/version.c
index 55a99be..6f80d19 100644
--- a/src/version.c
+++ b/src/version.c
@@ -759,6 +759,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2068,
+/**/
     2067,
 /**/
     2066,