portadmin crashes when searching for a netbox that has no type

[John-Magne Bredal]

Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 109, in get_response
    response = callback(request, *callback_args, **callback_kwargs)

  File "/usr/lib/python2.7/dist-packages/nav/web/portadmin/views.py", line 79, in index
    return search_by_sysname(request, netboxes[0].sysname)

  File "/usr/lib/python2.7/dist-packages/nav/web/portadmin/views.py", line 145, in search_by_sysname
    info_dict = populate_infodict(request, account, netbox, interfaces)

  File "/usr/lib/python2.7/dist-packages/nav/web/portadmin/views.py", line 182, in populate_infodict
    fac = get_and_populate_livedata(netbox, interfaces)

  File "/usr/lib/python2.7/dist-packages/nav/web/portadmin/utils.py", line 38, in get_and_populate_livedata
    handler = SNMPFactory.get_instance(netbox)

  File "/usr/lib/python2.7/dist-packages/nav/portadmin/snmputils.py", line 620, in get_instance
    vendor_id = netbox.type.get_enterprise_id()

AttributeError: 'NoneType' object has no attribute 'get_enterprise_id'

[John-Magne Bredal (john-m-bredal)]

Fix here https://nav.uninett.no/hg/stable/rev/b2cd9bbc6bd0