fix for 50542 crashes in filter tests
The crash is when a backentry is released, there is a call to CACHE_RETURN
and then check and free of a vlv entry.
But CACHE_RETURN, under some conditions, can free the backentry - the following check will
dereference a NULL entry and crashes
Fix: Reverse the order of freeing vlv entry and returning entry to cache
Note: Viktor did successfully runthe tests, thanks
Reviewed by: ?