Fixed crash building translated docs since Sphinx 1.8.
Fixed crash building translated docs since Sphinx 1.8.

koordinates/django,adamchainz/django,timgraham/django,elena/django,manhhomienbienthuy/django,auvipy/django,takis/django,monetate/django,takis/django,monetate/django,monetate/django,atul-bhouraskar/django,MarkusH/django,atul-bhouraskar/django,schinckel/django,fenginx/django,auvipy/django,theo-l/django,simonw/django,simonw/django,manhhomienbienthuy/django,takis/django,EmadMokhtar/Django,blighj/django,dsanders11/django,koordinates/django,felixxm/django,felixxm/django,apollo13/django,auvipy/django,EmadMokhtar/Django,dsanders11/django,monetate/django,georgemarshall/django,fenginx/django,shaib/django,takis/django,apollo13/django,atul-bhouraskar/django,MarkusH/django,blighj/django,frankvdp/django,timgraham/django,shaib/django,claudep/django,frankvdp/django,manhhomienbienthuy/django,rsalmaso/django,timgraham/django,django/django,MarkusH/django,auvipy/django,felixxm/django,kaedroho/django,charettes/django,solarissmoke/django,blighj/django,frankvdp/django,blighj/django,koordinates/django,theo-l/django,rsalmaso/django,charettes/django,wkschwartz/django,rsalmaso/django,georgemarshall/django,theo-l/django,charettes/django,claudep/django,pauloxnet/django,ghickman/django,wkschwartz/django,freakboy3742/django,pauloxnet/django,solarissmoke/django,adamchainz/django,wkschwartz/django,adamchainz/django,dsanders11/django,simonw/django,shaib/django,timgraham/django,elena/django,claudep/django,EmadMokhtar/Django,charettes/django,shaib/django,googleinterns/django,googleinterns/django,ghickman/django,freakboy3742/django,apollo13/django,koordinates/django,django/django,fenginx/django,django/django,georgemarshall/django,fenginx/django,wkschwartz/django,freakboy3742/django,felixxm/django,apollo13/django,schinckel/django,manhhomienbienthuy/django,googleinterns/django,atul-bhouraskar/django,pauloxnet/django,solarissmoke/django,googleinterns/django,kaedroho/django,elena/django,schinckel/django,adamchainz/django,georgemarshall/django,theo-l/django,elena/django,simonw/django,schinckel/django,kaedroho/django,solarissmoke/django,dsanders11/django,rsalmaso/django,ghickman/django,claudep/django,ghickman/django,frankvdp/django,pauloxnet/django,MarkusH/django,django/django