fix parseViewValue with undefined input
fix parseViewValue with undefined input

BrianRidgeway/ngMask,guilhermegm/ngMask,candreoliveira/ngMask,PetrusStarken/ngMask,settysreekanth/ngMask,lokesh-coder/ngMask,loansolutionsph/ngMask,Crunch-io/ngMask,shankurmahajan/ngMask,tamtakoe/ngMask,Crunch-io/ngMask,calebeoliveira/ngMask,settysreekanth/ngMask