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Merge pull request #545 from guoguo12/patch-1
authorMobiDevelop <support@mobidevelop.com>
Tue, 20 Aug 2013 23:33:33 +0000 (16:33 -0700)
committerMobiDevelop <support@mobidevelop.com>
Tue, 20 Aug 2013 23:33:33 +0000 (16:33 -0700)
Add further precondition checks


Trivial merge