Check added to OpenBitSet.indexOfNthSetBit to return -1 if parameter 0 or less.
Check added to OpenBitSet.indexOfNthSetBit to return -1 if parameter 0 or less.

yzhnasa/TASSEL-iRods,yzhnasa/TASSEL-iRods,yzhnasa/TASSEL-iRods,yzhnasa/TASSEL-iRods