samvermette/SVPullToRefresh — pull request #166 by guilhermearaujo (2013-11-29 12:27:42+00:00)
Title: Prevent crashing after setShowsInfiniteScrolling:NO twice

My app was crashing after calling ```[tableView setShowsInfiniteScrolling:NO]``` twice before re-setting to ```YES```.
I'm not sure why this happened, but apparently ```self.infiniteScrollingView.isObserving``` was not being set to ```NO```. So I swapped a couple of lines and it works again.