t81: fix admin edit company

apps/company/admin.py

@@ -78,7 +78,8 @@ def company_change(request, url):
             data['descriptions_%s' % code] = obj.descriptions
         # fill form
         form = CompanyForm(initial=data)
-        form.fields['city'].widget.attrs['data-init-text'] = company.city.name
+        if company.city:
+            form.fields['city'].widget.attrs['data-init-text'] = company.city.name
         # set choices filled by ajax
         # form.fields['city'].choices = [(item.id, item.name) for item in City.objects.filter(country=data['country'])]
         form.fields['tag'].choices = [(item.id, item.name) for item in Tag.objects.filter(theme__in=data['theme'])]