Fix typo in phpdoc. props jcastaneda. fixes #24185.

git-svn-id: http://core.svn.wordpress.org/trunk@24096 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Avoid an undefined variable notice. props lightningspirit. fixes #24190.

git-svn-id: http://core.svn.wordpress.org/trunk@24097 1a063a9b-81f0-0310-95a4-ce76da25c4cd