Bug#961088: Acknowledgement (libsane-hpaio fails to detect HP MFDs)

[Jan Nordholz <j.nordholz@tu-berlin.de>]

Hi,

my issue is plain and simple: libsane.hpaio.1.0.0 is no longer dlopen()able
due to an unresolved symbol '_DBG', used in scan/sane/orblite.c:198.
You can check this easily by running scanimage with envvar SANE_DEBUG_DLL=1:

=====
] jan@p53:~$ SANE_DEBUG_DLL=1 scanimage -d "hpaio:/net/envy_5000_series?ip=192.168.178.41&queue=false" -T
] [sanei_debug] Setting debug level of dll to 1.
] [dll] sane_init: SANE dll backend version 1.0.13 from sane-backends 1.0.27
] [dll] add_backend: `hpaio' is already there
] [dll] load: dlopen() failed (/usr/lib/x86_64-linux-gnu/sane/libsane-hpaio.so.1: undefined symbol: _DBG)
] scanimage: open of device hpaio:/net/envy_5000_series?ip=192.168.178.41&queue=false failed: Invalid argument
=====

A few other files in scan/sane/ include a header that defines the _DBG()
macro to call syslog(), but orblite.c doesn't.

What puzzles me is that the call is flagged as undefined in both build
logs (3.20.3+dfsg0-2 and 3.20.5+dfsg0-2) - however, in the old version
the call in the final shared library *has* been replaced by a call to
__syslog_chk(). (Don't want to figure out how that's happening.)

Anyway, resolving that _DBG() invocation in orblite.c should trivially
fix this bug.

Thanks for considering

Jan