Fix for HashLink target: SpriterUtil.clearArray can break at runtime#41

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tbrosman wants to merge 2 commits intoloudoweb:masterfrom

tbrosman:hashlink-fix

Commits on Jul 6, 2019

Test cleanup. Added test compilation/run targets for HashLink in Haxe 3 and 4.
tbrosman
committed

Commits on Jul 13, 2019

Fixed a bug where calling SpriterUtil.clearArray can break in HashLink at runtime.
tbrosman
committed