In refresh_blog_details(), make sure clean_blog_cache() gets the blog ID when the blog has been previously cached as non-existent. This ensures that -1 values in blog-details are cleared after blogs are created.

Props beezeee, hirozed
fixes #23405


git-svn-id: http://core.svn.wordpress.org/trunk@23752 1a063a9b-81f0-0310-95a4-ce76da25c4cd