fix missing data bug in linkSampling
fix missing data bug in linkSampling

tfmorris/dedupe,davidkunio/dedupe,davidkunio/dedupe,neozhangthe1/dedupe,01-/dedupe,neozhangthe1/dedupe,tfmorris/dedupe,01-/dedupe,dedupeio/dedupe,datamade/dedupe,nmiranda/dedupe,nmiranda/dedupe,dedupeio/dedupe,pombredanne/dedupe,datamade/dedupe,pombredanne/dedupe