patch 8.2.0060: message test only runs with one encoding

Problem:    Message test only runs with one encoding. (Dominique Pelle)
Solution:   Run the test with "utf-8" and "latin1".  Fix underflow. (related
            to #5410)

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    60,
 /**/
     59,
 /**/