The assert in vlVaHandleHuffmanTableBufferType()  seems incorrect. Based on the pattern of the other functions in the file, it should be:
assert(buf->size >= sizeof(VAHuffmanTableBufferJPEGBaseline) && buf->num_elements == 1);
assert(buf->size >= sizeof(VASliceParameterBufferJPEGBaseline) && buf->num_elements == 1);
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