MGLMapSnapshotter.loading is always false

[1ec5]

MGLMapSnapshotter.loading’s getter always returns NO. Nothing within the MGLMapSnapshotter implementation ever sets the synthesized ivar, so it maintains the default value of NO.

mapbox-gl-native-ios/platform/darwin/src/MGLMapSnapshotter.h

Lines 274 to 277 in aa3f387

	/**
	Indicates whether a snapshot is currently being generated.
	*/
	@property (nonatomic, readonly, getter=isLoading) BOOL loading;

This regression was introduced in 315a9e3 in mapbox/mapbox-gl-native#12355. The sole references to this property were removed in favor of an internal property that was never synchronized with loading.

/cc @mapbox/maps-ios