bug#22302: 25.1.50; time-stamp ignores time-stamp-time-zone

[Glenn Morris]

Harald Hanche-Olsen wrote:

> Run emacs -Q and insert this text:
> Time-stamp: <>
>
> Then do:
> M-: (require 'time-stamp) RET
> M-x set-variable RET time-stamp-time-zone RET "UTC" RET
> M-x time-stamp
>
> Expected result: A UTC time stamp is inserted.
> Actual result: A time stamp in the local time zone is inserted.

This is due to af32fa956. Paul, could you have a look please?