Automattic/jetpack — pull request #435 by johnpbloch (2014-03-31 15:57:17+00:00)
Title: Make sure $pagenow exists before trying to use it

Quick fix [for the bug](https://github.com/Automattic/jetpack/commit/4ac8ceaf30263932175bcf45f6032a48fc3122c4#commitcomment-5855029) referenced by @georgestephanis earlier.