[Github Pull Request] Fixed file open error messages in debug output

[yangoliver@xxxxxxxxx (oliver yang)]

Hello,

I created a new pull request below to fix some error messages in debug output,

https://github.com/Irqbalance/irqbalance/pull/21

Please review and give your comments.

Sorry I'm not able to attach patch directly as I had the difficulties
to attach the file via gmail.

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Oliver Yang