[zendframework/zf2#4137] Re-instate code removed during merge
[zendframework/zf2#4137] Re-instate code removed during merge

- Decimal representations in NumberFormat view helper were broken due to
  bad merge.

MadCat34/zend-i18n,mlocati/zendframework2-i18n-v3,Maks3w/zend-i18n,zendframework/zend-i18n