zotero/zotero — pull request #210 by aurimasv (2012-12-11 02:11:10+00:00)
Title: [WebPageDump] Don't crash when @import stylesheets are null

For whatever reason, sometimes stylesheets specified via @import rules are null when adblock blocks them.

http://forums.zotero.org/discussion/19871/snapshot-the-attached-file-could-not-be-found/
http://forums.zotero.org/discussion/26778/file-not-found/

closes #10