wp_print_styles() doesn't call "wp_print_styles" action when "$handles" argument passed

[evgenniy]

In wp_print_styles(), there is "wp_print_styles" action calls when function is used with optional "$handles" argument.

if () statement should be deleted ( like wp_print_scripts() ).

Unit tests are passed.

[evgenniy]

Patch

[stephenharris]

@evgenniy are you able to add a unit test for this?

[SergeyBiryukov]

Introduced in [19649].

[evgenniy]

Replying to stephenharris:

@evgenniy are you able to add a unit test for this?

Yes, I can add unit test for wp_print_styles() function.

[rachelbaker]

@evgenniy It would also be helpful if you could generate the patch from the root directory. Looks like functions.wp-styles.diff​ was generated from within the wp-includes directory.

[rachelbaker]

Punting out of 4.6 pending unit tests and a refreshed patch

[westonruter]

The inclusion of the if was done intentionally in [19649] to fix #19510. Removing the if will cause all kinds of back-compat breakage now.

If an action is needed whenever wp_print_styles() is called regardless of whether the $handles arg is passed, then we'll need a new action to trigger separately.