[sane-devel] a backend test

[Frank Zago]

> tstbackend -d mustek_usb -l1 (recursion = 1)
>           TEST: options consistency
> 	  warnings: 0  error: 0  checks: 1379
>
> tstbackend -d mustek_usb -l1 (recursion = 2)
>           TEST: options consistency
> 	  ERROR   : cannot get boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot set boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot set boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot get boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot set boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot set boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot get boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot set boolean option 12 value (Invalid argument)
> 	  ERROR   : cannot set boolean option 12 value (Invalid argument)
> 	  warnings: 0  error: 9  checks: 2270

That is probably a design flaw in tstbackend related to the recursion.
I'll think about it.

Frank.