Inadvertently introduced a segfault on exit on the last commit,

while trying to get rid of a compiler warning.  Fixed by this
update.

VERSION

@@ -1 +1 @@
-8.3.455
+8.3.456

utils/main.c

@@ -800,7 +800,7 @@ mainInitAfterArgs()
 void tcl_exit_hook(ClientData clientData)
 {
     TxResetTerminal();
-    exit(*(int *)clientData);
+    exit(*(int *)(&clientData));
 }
 
 /*