Codestyling in bp_blogs_record_activity()

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8474 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Don't use extract() in bp_blogs_record_activity()

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8475 cdf35c40-ae34-48e0-9cc9-0c9da1808c22