Parche para django_opendi_auth v0.4, para devolver usuario de Django asociado al EMAIL reportado por OpenId

patch-django-openid-auth-by-email.diff

index 58478ec..31e2833 100644
--- a/src/django_openid_auth/auth.py
+++ b/src/django_openid_auth/auth.py
@@ -30,6 +30,9 @@
 
 __metaclass__ = type
 
+import logging
+import pprint
+
 from django.conf import settings
 from django.contrib.auth.models import User, Group
 from openid.consumer.consumer import SUCCESS
@@ -79,6 +82,28 @@ class OpenIDBackend:
             user = user_openid.user
 
         if user is None:
+            details = self._extract_user_details(openid_response)
+            #    details = {
+            #        'first_name': u'Fist Name',
+            #        'last_name': u'Last Name',
+            #        'nickname': None,
+            #        'email': u'[email protected]'
+            #    }
+        
+            if 'email' in details:
+                try:
+                    user = User.objects.get(email=details['email'])
+                    if not user.is_active:
+                        logging.error("Se encontro el usuario %d asociado a email '%s', "
+                            "pero el usuario no esta 'activo'.", user.id, details['email'])
+                        user = None
+                except User.DoesNotExist:
+                    pass
+            else:
+                logging.error("Se encontro entrada 'email' en detalles: %s",
+                    pprint.pformat(details))
+
+        if user is None:
             return None
 
         if getattr(settings, 'OPENID_UPDATE_DETAILS_FROM_SREG', False):