Fix NSBackgroundActivityScheduler exception caused by interval value
Fix NSBackgroundActivityScheduler exception caused by interval value

NSBackgroundActivityScheduler requires an interval value >= 1. A value
less than that raises an exception.

ViennaRSS/vienna-rss,barijaona/vienna-rss,ViennaRSS/vienna-rss,barijaona/vienna-rss,josh64x2/vienna-rss,barijaona/vienna-rss,ViennaRSS/vienna-rss,Eitot/vienna-rss,josh64x2/vienna-rss,barijaona/vienna-rss,Eitot/vienna-rss,josh64x2/vienna-rss,ViennaRSS/vienna-rss,Eitot/vienna-rss,josh64x2/vienna-rss,Eitot/vienna-rss,ViennaRSS/vienna-rss,barijaona/vienna-rss,josh64x2/vienna-rss