bug#16438: 24.3.50; `C-x TAB right right' fails with error (mark-inactive)

[Juri Linkov]

> But the condition of checking for the transient mode doesn't work
> because overriding-terminal-local-map never equals to indent-rigidly-map.
>
>  indent-rigidly-map:
>   (keymap (S-right . indent-rigidly-right-to-tab-stop) (S-left . 
> indent-rigidly-left-to-tab-stop) (right . indent-rigidly-right) (left . 
> indent-rigidly-left))
>
>  overriding-terminal-local-map:
>   (keymap (keymap (S-right . indent-rigidly-right-to-tab-stop) (S-left . 
> indent-rigidly-left-to-tab-stop) (right . indent-rigidly-right) (left . 
> indent-rigidly-left))
>           add-keymap-witness)

I fixed this by using (eq (cadr overriding-terminal-local-map) 
indent-rigidly-map)