[FIX] ratings: Restore average ratings display if rating_results_detailed is off (lost in r49899 i think)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52483 b456876b-0849-0410-b77d-98878d47e9d5
[MRG] Automatic merge, branches/13.x 52481 to 52483

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52484 b456876b-0849-0410-b77d-98878d47e9d5