Missing parenthesis in get_bookmarks is breaking Links

[batmoo]

r25934 introduce a bug in get_bookmarks because it's missing paranthesis around the cache check:

if ( is_array($cache) && isset( $cache[ $key ] ) ) 

We end up doing an early return because the apply_filters call isn't contained within the parenthesis.

This is causing the Links section to break.

[batmoo]

Patch adds missing parentheses.

[dd32]

In 26046:

Add some missing braces to get_bookmarks() which was causing an early return. Introduced in [25934]. See #25468. Fixes #25874

[dd32]

Props to batmoo for that patch, had to apply manually and forgot!