Guard against crash when attempting to transform [NSNull null] to date
Guard against crash when attempting to transform [NSNull null] to date

ChronicStim/EasyMapping,maximgolunov/EasyMapping,jazzz13/EasyMapping,PodsMakleso6/EasyMapping,ChronicStim/EasyMapping,keslcod/EasyMapping,jazzz13/EasyMapping,lucasmedeirosleite/EasyMapping,keslcod/EasyMapping,maximgolunov/EasyMapping,PodsMakleso6/EasyMapping,lucasmedeirosleite/EasyMapping,ChronicStim/EasyMapping