Fix CA2242: Use call to Double.IsNaN instead of direct comparison 'Double.NaN'.
Fix CA2242: Use call to Double.IsNaN instead of direct comparison 'Double.NaN'.


git-svn-id: c2c5d07e262ed50e40b747c12a6c75ebdd83f29b@312 3d0cb27c-5942-9f1f-b0c8-b51bd5f61ba7

antony-liu/npoi,jcridev/npoi,vinod1988/npoi,tonyqus/npoi,Yijtx/npoi,tkalubi/npoi-1,JesseQin/npoi,stuartwmurray/npoi,xl1/npoi,akrisiun/npoi