Potential division by zero

Created by: SwiftPengu

There is no check whether noDrops is zero (except for drops + noDrops > SAMPLE_SIZE). Sounds to me like 7 consecutive switches to the same or a larger representation will cause a /0 error.

https://github.com/Dash-Industry-Forum/dash.js/blob/ceabcefdade75d88e3e411c07077fd503075bd3c/src/streaming/rules/abr/SwitchHistoryRule.js#L32