`is_array( 1, '1-foo' )` returns true, which means that `is_page( 1 )`
was returning true when on a page with the slug '1-foo'. We avoid this odd
behavior by casting the queried object ID to a string before testing against
the value passed to the conditional function.
This also helps to avoid a problem where an arbitrary value for `$page` would
cause `is_page( $page )` to return true if the query had been manipulated by
a plugin to show that the current page's ID is 0.
Props boonebgorges, r-a-y, nunomorgadinho, wonderboymusic, clifgriffin.
Fixes#24674.
git-svn-id: https://develop.svn.wordpress.org/trunk@31458 602fd350-edb4-49c9-b593-d223f7449a82
4138275df9