Crashfix for CalendarDay having an undefined props.height

[wbercx]

CalendarDay's calcSizes calculates a responsive containerHeight by doing Math.round(props.height). Ditto for the width.

During development, props.height would sometimes be undefined, causing it to do Math.random(undefined) which yielded NaN. This occurred even when an explicit dayComponentHeight was being passed in. That in turn led to the following error, causing an app crash on Android:

Invariant Violation: [847,"RCTView",81,{"justifyContent":"center","alignItems":"center","alignSelf":"center","width":0,"height":"<<NaN>>","borderRadius":0,"backgroundColor":0}] is not usable as a native method argument

• That's when using JSC and RN 0.64.2. Hermes crashes without a useful error.
• The issue was particularly prevalent when using Fast Refresh. Once it happened I always had to reinstall the app onto the device to get it to work again.
• I noticed containerWidth was always 0 in my logs, so I defaulted it to that and chose to do the same with the height. Have not seen any issues so far.

[peacechen]

Thanks @wbercx

[peacechen]

Published in 2.2.5