c7ed718720
The helper call rounds up to next multiple of specified boundary. If one passes a very large value as first argument, then there might not be a next multiple. So far we ignored that. Let's handle this now and return SIZE_MAX in this case, as special indicator that we reached the end. Of course, IRL this should not happen. With this new change we at least do something somewhat reasonable, leaving it to the caller to handle it further.
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