ericmann/SwiftStream — pull request #1 by ivanlopez (2014-10-13 11:53:01+00:00)
Title: check to see if  $_wp_additional_image_sizes is set

If a user has not added a custom image size $_wp_additional_image_sizes is null and array_merge( $_wp_additional_image_sizes, $new_sizes ) error out because parameter one is not an array.