Fix function lookup in function cache
Fix function lookup in function cache

jriehl/numba,stefanseefeld/numba,pombredanne/numba,gmarkall/numba,seibert/numba,ssarangi/numba,stefanseefeld/numba,sklam/numba,GaZ3ll3/numba,stonebig/numba,pitrou/numba,pitrou/numba,numba/numba,stonebig/numba,numba/numba,ssarangi/numba,stuartarchibald/numba,stonebig/numba,sklam/numba,jriehl/numba,cpcloud/numba,sklam/numba,gdementen/numba,cpcloud/numba,gdementen/numba,stefanseefeld/numba,sklam/numba,stuartarchibald/numba,stuartarchibald/numba,IntelLabs/numba,pombredanne/numba,pitrou/numba,ssarangi/numba,pombredanne/numba,IntelLabs/numba,GaZ3ll3/numba,IntelLabs/numba,shiquanwang/numba,ssarangi/numba,shiquanwang/numba,numba/numba,jriehl/numba,seibert/numba,gmarkall/numba,stuartarchibald/numba,seibert/numba,cpcloud/numba,gmarkall/numba,stonebig/numba,stefanseefeld/numba,gdementen/numba,GaZ3ll3/numba,GaZ3ll3/numba,seibert/numba,stuartarchibald/numba,ssarangi/numba,jriehl/numba,cpcloud/numba,pitrou/numba,seibert/numba,jriehl/numba,GaZ3ll3/numba,gdementen/numba,gdementen/numba,gmarkall/numba,IntelLabs/numba,stonebig/numba,pombredanne/numba,pombredanne/numba,sklam/numba,gmarkall/numba,stefanseefeld/numba,shiquanwang/numba,numba/numba,cpcloud/numba,IntelLabs/numba,pitrou/numba,numba/numba