[sane-devel] fixes for genesys backend

[Stef]

     Hello,

     in genesys backend build 2508 (commit 
4eea901305c9cb66428023c93cbd1a63af8c5fba) I have just pushed fixes for 
several opened issues in the bug tracker:

     - #315104 
(https://alioth.debian.org/tracker/?func=detail&atid=410366&aid=315104&group_id=30186)
     - #315105 
(https://alioth.debian.org/tracker/?func=detail&atid=410366&aid=315105&group_id=30186)

     Thanks to the work of John S.  Weber <jweber53 at gmail.com>, a timing 
issue on USB3 hardware has been tracked and fixed.  Could also close 
#313887 
(https://alioth.debian.org/tracker/index.php?func=detail&aid=313887&group_id=30186&atid=410366). 
This is also a possible fix to #314832 
(https://alioth.debian.org/tracker/?func=detail&atid=410366&aid=314832&group_id=30186) 
which I couldn't never reproduced but has a little chance to be related.

     I have improved tstbackend to provides a -s option that trigger 
scan during open/close tests so issues with resource allocation are 
better detected (such as #315104).

Regards,
     Stef