[FIX][bp/r45168] Logic mistake

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/10.x@45169 b456876b-0849-0410-b77d-98878d47e9d5
[ENH][bp/r45171] Add RSS category filters for articles

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/10.x@45172 b456876b-0849-0410-b77d-98878d47e9d5