tools: measure-fuzz: handle a None return correctly
Fixes #472 (closed)
Fixes the crasher reported in that bug anyway - the fact that it triggered this path means the fuzz isn't set correctly but that's a separate problem.
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Fixes #472 (closed)
Fixes the crasher reported in that bug anyway - the fact that it triggered this path means the fuzz isn't set correctly but that's a separate problem.