clear jshint errors

[hthetiot]

** READ THIS FIRST! **

Are you implementing a new feature?

No

Is this a security patch?

No

Checklist

• I have read the CONTRIBUTING guidelines.
• I have added test cases which verify the correct operation of this feature or patch.
• I have added documentation pertaining to this feature or patch.
• The automated test suite ($ make test) executes successfully.
• The automated code linting ($ make lint) executes successfully.

[hthetiot]

Sorry trying to push 59fd668 separately but keep fucking up, cause previous commit are already in master for me.