Fixed #12099 -- Prevented admindocs from crashing when an application that provides template tags libraries is packaged as an egg. These libraries will be ignored.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17401 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admindocs/views.py

@@ -307,11 +307,14 @@ def load_all_installed_template_libraries():
     # Load/register all template tag libraries from installed apps.
     for module_name in template.get_templatetags_modules():
         mod = import_module(module_name)
+        try:
             libraries = [
                 os.path.splitext(p)[0]
                 for p in os.listdir(os.path.dirname(mod.__file__))
                 if p.endswith('.py') and p[0].isalpha()
             ]
+        except OSError:
+            libraries = []
         for library_name in libraries:
             try:
                 lib = template.get_library(library_name)