Fix whitespace issues in NValue.hpp
Fix whitespace issues in NValue.hpp

deerwalk/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,migue/voltdb,VoltDB/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,paulmartel/voltdb,paulmartel/voltdb,paulmartel/voltdb,deerwalk/voltdb,migue/voltdb,VoltDB/voltdb,deerwalk/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,migue/voltdb,paulmartel/voltdb,paulmartel/voltdb,migue/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,paulmartel/voltdb,migue/voltdb,migue/voltdb,deerwalk/voltdb,VoltDB/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,migue/voltdb,deerwalk/voltdb,migue/voltdb,paulmartel/voltdb,paulmartel/voltdb