Alembic MeshReader : Don't load invalid UVs #1464
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If the UVs in the Alembic archive were malformed, we were creating invalid primitive variables, with incorrect data lengths. These then caused corruption when `reverseWinding()` ran off the end of the array.
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If the UVs in the Alembic archive were malformed, we were creating invalid primitive variables, with incorrect data lengths. These then caused corruption when
reverseWinding()ran off the end of the array.