Twenty Thirteen - broken localization of custom header images

[pavelevap]

Function twentythirteen_custom_header_setup() is probably called before twentythirteen_setup() and they are related to the same after_setup_theme action. So, twentythirteen textdomain is loaded after twentythirteen_custom_header_setup() and that is why localization of 3 strings (Star, Diamond and Circle) for custom header does not work.

See attached patch (works for me).

[SergeyBiryukov]

Confirmed the bug and the fix.

[obenland]

Another reason I like to aggregate all includes at the end of the functions.php file.

Although setting a priority will always work and would not be depended on the chance of the callback being registered at the right time. :)

[nacin]

Priority is much more reliable than include order.

[nacin]

In 25129:

Twenty Thirteen: Ensure custom headers are set up after the localization is initialized.

props pavelevap.
fixes #24943.