account_chooser_find_account_foreach: check the col type
account_chooser_find_account_foreach: check the col type

As non ROW_ACCOUNT rows don't have an account.

Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets