Fix bug in membership lookup.
Fix bug in membership lookup.

hasadna/OpenCommunity,hasadna/OpenCommunity,nonZero/OpenCommunity,nonZero/OpenCommunity,yaniv14/OpenCommunity,nonZero/OpenCommunity,nonZero/OpenCommunity,yaniv14/OpenCommunity,yaniv14/OpenCommunity,yaniv14/OpenCommunity,hasadna/OpenCommunity,hasadna/OpenCommunity