non-staff user causes Exception when trying to access /admin/

[procmail]

Hi,

When I'm logged in as a non-staff user, and try to access /admin/, I get the following:

DoesNotExist at /admin/login/
SitePermission matching query does not exist.
Request Method: GET
Request URL:    http://10.211.55.20/admin/login/?next=/admin/
Django Version: 1.7
Exception Type: DoesNotExist
Exception Value:    
SitePermission matching query does not exist.
Exception Location: /home/deric/.virtualenvs/reader/lib/python3.4/site-packages/django/db/models/query.py in get, line 357
Python Executable:  /home/deric/.virtualenvs/reader/bin/python
Python Version: 3.4.1
Python Path:    
['/home/deric/.virtualenvs/reader/reader',
 '/usr/local/lib/python34.zip',
 '/usr/local/lib/python3.4',
 '/usr/local/lib/python3.4/plat-linux',
 '/usr/local/lib/python3.4/lib-dynload',
 '/home/deric/.virtualenvs/reader/lib/python3.4/site-packages',
 '/home/deric/.virtualenvs/reader']
Server time:    Mon, 8 Sep 2014 14:56:55 +0800
Error during template rendering

In template /home/deric/.virtualenvs/reader/lib/python3.4/site-packages/mezzanine/core/templates/admin/base_site.html, error at line 51
SitePermission matching query does not exist.
41  
42  {% endblock %}
43  
44  {% block rtl_styles %}
45  {{ block.super }}
46  <link rel="stylesheet" type="text/css" href="{% static "mezzanine/css/admin/rtl.css" %}" />
47  {% endblock %}
48  
49  {% block before_content %}
50  {% if user.is_authenticated and not is_popup and not request.GET.pop %}
51  {% admin_dropdown_menu %}
52  {% endif %}
53  {% endblock %}
54  
55  {% block footer %}
56  {% if form.this_is_the_login_form %}
57      <script src="{% static "mezzanine/js/admin/login.js" %}"></script>
58  {% else %}
59      {% if user.is_authenticated %}
60          {% if not is_popup and not request.GET.pop %}
61          <link rel="stylesheet" href="{% static "mezzanine/chosen/chosen.css" %}">

Changed line 50 of base_site.html to avoid this:

{% if user.is_authenticated and user.is_staff and not is_popup and not request.GET.pop %}

[stephenmcd]

Thanks for the report!