resolve of i18n_patterns does not match default language paths with prefix_default_language=False

[nielsole]

I believe this to be a follow-up of #27402

### urls.py

urlpatterns += i18n_patterns(
   url(r'^', include('main.urls', namespace="main")),
   prefix_default_language=False)

Now in a custom tag I try to resolve the URL(e.g. '/login/', '/en/login/'). This fails if the path is not prefixed(e.g. '/login/'):
### my_custom_tag

path = context['request'].path
url_parts = resolve(path) # raises 404

The URL of course exists as it is the current URL directly from the context.

My version: 1.11.4
Sorry for the brief bug report, but my laptop is running out of battery and I don't have a charger