Fix two blatant code typos

[jrf]

case and default statements used in a switch control structure should be followed by a : colon.

While working on ​an issue in the WordPress Coding Standards, I came across two typos which need to be fixed. Both use a ; semi-colon instead of a colon.

[adamsilverstein]

Hi @jrf those might be fixed for consistency sake though semicolons are strangely allowed in switch statements: ​http://php.net/manual/en/control-structures.switch.php

[jrf]

@adamsilverstein Good point, but yes, consistency would definitely win out here. These are the stats I just generated for core in that respect:

Default/case statement followed by colon:
        yes [3325/3327, 99.94%]
        no => 2 (0.06%)

[SergeyBiryukov]

In 40997:

General: Always use colon instead of a semicolon in switch() control structures.

Props jrf.
Fixes #41234.