Fix for problem where displayDurationForString could return value less than minimumDismissTimeInterval.
Fix for problem where displayDurationForString could return value less than minimumDismissTimeInterval.

dxt/SVProgressHUD,TransitApp/SVProgressHUD,maxcampolo/SVProgressHUD,cnzlh/SVProgressHUD,SuPair/SVProgressHUD,Dschee/SVProgressHUD,SVProgressHUD/SVProgressHUD,Sunday4/SVProgressHUD