Windows Phones are ignored by wp_is_mobile
|Reported by:||Ipstenu||Owned by:|
Reported in the forums by vaibhav3 - http://wordpress.org/support/topic/wp_is_mobile-returning-false-values/
wp_is_mobile() doesn't have an 'If Windows Phone' clause which throws off some phones which apparently don't have a 'mobile' fall back.
Attached is a patch that adds it in.