Report an error if urlpatterns contain a string view name and it is empty. Refs #4319.
Report an error if urlpatterns contain a string view name and it is empty.
Refs #4319.

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extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%405360

Belgabor/django,Belgabor/django,Belgabor/django