Fix access to undefined property

[powli]

During testing with the js-example I noticed that the implementation of these options, while marked as deprecated does not work.

This pull requests fixes the problem.

[ronaldmiddelkoop]

Thanks for spotting this. We'll incorporate this at the first opportunity (we can't directly use the pull request unfortunately).

[rob-spoor]

This fix will be part of the next release.

[ebomcke-ingenico]

Fixed in release 3.8.0.