Correct exit code if number of errors % 256 == 0

[lamby]

For example, we had 256 errors (etc.) our process will exit with a
successful error code which is incorrect and/or misleading.

[googlebot]

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[lamby]

Signed.

[googlebot]

CLAs look good, thanks!

[aliafshar]

Hi, thanks for this. I prefer explicly setting the error to 1 or 0

[lamby]

Hi, thanks for this. I prefer explicly setting the error to 1 or 0

Fair. Updated.

[aliafshar]

Thanks 👍