patch 8.2.4621: crash when using the tabline right-click menu

Problem:    Crash when using the tabline right-click menu.
Solution:   Use XtPointer for XmNuserData. (closes #10009)
diff --git a/src/version.c b/src/version.c
index 6405e3b..bcb70e8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4621,
+/**/
     4620,
 /**/
     4619,