patch 8.2.3462: ModeChanged only uses one character for new_mode and old_mode

Problem:    The ModeChanged event only uses one character for the new_mode and
            old_mode values.
Solution:   Pass one as first argument to mode(). (issue #8856)

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3462,
 /**/
     3461,
 /**/