stbt.{Match,Motion}Timeout debug output shows values < 1
stbt.{Match,Motion}Timeout debug output shows values < 1

If you used `wait_for_match(..., timeout_secs=0.5)` the MatchTimeout
exception's message was "Didn't find match for ... within 0 seconds".

Note that stbt doesn't currently guarantee to process every frame
of video, so very small values for timeout_secs aren't as useful as you
might think. stbt does guarantee to process at least one frame (even if
`timeout_secs=0`).

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