fix for error when trying to read options from null
fix for error when trying to read options from null

deenairn/ngHandsontable,viktor-hunko/ngHandsontable,kalrover/ngHandsontable,viktor-hunko/ngHandsontable,suryasingh/ngHandsontable,jintoppy/angular-ui-handsontable,suryasingh/ngHandsontable,handsontable/ngHandsontable,kalrover/ngHandsontable,deenairn/ngHandsontable,mattlucas121/ngHandsontable,handsontable/ngHandsontable,AzharWeb/ngHandsontable,mattlucas121/ngHandsontable,AzharWeb/ngHandsontable