Notice: Undefined index: granularity/hoursformat in office_hours_field_settings_form() (office_hours.module)

The following notices were already mentionned in : http://drupal.org/node/991410#comment-4133572
But I think it's better to create a new issue in order not to mess things up with the actual D7 port topic.

Steps to reproduce install the 7.X branch 2011-Mar-31 patch it with http://drupal.org/node/991410#comment-4285936 in order for it to work. Then just create an office hour field and the notices comes up with the field creation form.

# Notice : Undefined index: granularity in office_hours_field_settings_form() (line 168 in (...)/sites/all/modules/office_hours/office_hours.module).
# Notice : Undefined index: hoursformat in office_hours_field_settings_form() (line 169 in (...)/sites/all/modules/office_hours/office_hours.module).
# Notice : Undefined index: granularity in office_hours_field_settings_form() (line 176 in (...)/sites/all/modules/office_hours/office_hours.module).
# Notice : Undefined index: hoursformat in office_hours_field_settings_form() (line 177 in (...)/sites/all/modules/office_hours/office_hours.module).