Typo: images -> image

[michieldwitte]

Check if the image is an instance of Image.Image, instead of the list containing the images.

[pklaus]

Thanks michieldwitte, good catch.
I'll be away from a computer with a keyboard for some days and therefore won't be able to create a new release right now. I'll post a moment again, once new release is out.

[pklaus]

The new release (containing this fix) is out now:
https://github.com/pklaus/brother_ql/releases/tag/v0.9.2

Thanks again for contributing!