Dan Hodos d9f7299154 iOS: Ensure onLoad and onLoadEnd get called
Setting properties from JS to native components does not guarantee any
order (as far as I know). Because of this, `setSource` can get called
and complete before `setOnFastImageLoad` and `setOnFastImageLoadEnd`,
which results in the callbacks never firing.

This change implements a simple check for these callback properties
getting set after the image has loaded, and fires them at that time.
2018-03-07 22:10:23 -05:00
..
2017-04-17 18:42:16 -04:00
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