[sane-devel] Cleanup and small fixes

[Volker Diels-Grabsch]

Dear SANE developers,

I'm new to SANE and I want to improve the hp5590 backend driver.
As a start, to "get into" the code base, I fixed various minor
issues, mostly compiler warnings and typos.

I'm not sure which is the best way to contribute, so I'm providing
this as a series of (mostly) independent patches to this mailing list.
I could also open one or more tickets in the issue tracker, if that
helps.

I believe that most patches are uncontroversial, although I expect
some discussion for patches 0009 and 0012, as I possibly didn't find
the best solution there.


Regards,
Volker

-- 
Volker Diels-Grabsch
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