joshua-hull/Reddit-Image-Scraper — pull request #26 by aggrolite (2013-12-18 04:30:45+00:00)
Title: issue #21 - die on nonexistent subreddits

bogus subreddits like /r/pics1234 redirect to a subreddit search
page. detect mech's uri path and die if it matches

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this solves half of issue #21