patch 8.1.0460: assert_fails() does not take a message argument

Problem:    assert_fails() does not take a message argument
Solution:   Add the argument.
diff --git a/src/version.c b/src/version.c
index c868496..7a2e94a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    460,
+/**/
     459,
 /**/
     458,