small change: pass int to wp_redirect

[niallkennedy]

wp_redirect expects an integer value for the "status" variable. The wp_redirect function passes the variable to PHP's header() function, which also expects an integer.
​http://core.trac.wordpress.org/browser/tags/3.1.2/wp-includes/pluggable.php#L873

Pass an integer value instead of a string in WP Query.

[niallkennedy]

integer instead of string

[nacin]

In [17810]:

Use int for redirect code. props niallkennedy, fixes #17321.