fix bug in rleToBbox #477
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fix bug in rleToBbox #477
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The original rleToBbox implementation assumes there are no >2 consecutive 0s in the RLE counts.
When there are >2 consecutive 0s, it produces wrong results.
A test case can be found at https://github.com/ppwwyyxx/cocoapi/blob/41c304546efbbdd0f35c2642c3ecd19722dcf819/tests/test_cases.py#L25-L34