No translation of duration time units in cart settins summary

In uc_cart_admin.inc, cart duration units (anonymous and authenticated) are not translated.

I think this is beause they are in the form :

'#summary' => t('Anonymous cart duration is @duration', 
  array('@duration' => variable_get('uc_cart_anon_duration', '4') .' '. variable_get('uc_cart_anon_unit', 'hours'))
)

and no translation is found for the @duration value. I think that the summary should be like this :

'#summary' => t('Anonymous cart duration is @duration @unit', 
  array(
    '@duration' => variable_get('uc_cart_anon_duration', '4'),  
    '@unit' => t(variable_get('uc_cart_anon_unit', 'hours'))
  )
)