Don't try to clear storage on devices without internal storage

This change prevents warnings like 'Failed to clear storage before first enrollment: Device has no storage.'.

Hah, good point. Luckily it was just a warning, but it is good to add the appropriate check.

We could also directly check for FP_DEVICE_FEATURE_STORAGE_CLEAR. That check should be equivalent (a device should always offer one of the features, i.e. list and/or clear).

merged

Huh, in case you got the CI failure. Not sure what is happening, it must be a fallout of a python-dbusmock fix that I made a while ago …

btw. around here we usually wrap git commit messages at 72 characters or so. Also, adding a new line after the header.

No big deal, just thought I would note it, as I happened to see it in the history.