Fixed #10289 -- Corrected typo that produced oversensitive rejection of...

Fixed #10289 -- Corrected typo that produced oversensitive rejection of Postgres versions. Thanks to Ian Kelly for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9845 bcc190cf-cafb-0310-a4f2-bffc1f526a37