Unused private field - Rebuild of the Debian archive with clang

"Unused private field" build failure(s)
clang 3.3

clang -Wall -Werror will fail because bar is private (by default) and never used. g++ does not complain here.

class foo
{
    int bar;
};

Versions: 2.9 - 3.0 - 3.1 - 3.2 - 3.3 - 3.4 - 3.4.2 - 3.5.0 - 3.6.0 - 3.8.1 - 3.9.1 - 4.0.1 - 5.0 - 6.0 - 8.0.1 - 9.0.1 - 10.0.0 - 11.0.0 - 12.0.1 - 13.0.0

Package	Version	Supposed error message	Full log
clementine	1.1.1+dfsg-2	playlistundocommands.h:113:9: error: private field 'column_' is not used [-Werror,-Wunused-private-field]	Log
liborcus	0.3.0-8	../../include/orcus/odf/ods_handler.hpp:63:41: error: private field 'mp_factory' is not used [-Werror,-Wunused-private-field]	Log
libwpg	0.2.1-1	./WPGHeader.h:54:16: error: private field 'm_entryCount' is not used [-Werror,-Wunused-private-field]	Log
qpid-cpp	0.16-7	qpid/client/RdmaConnector.cpp:72:33: error: private field 'initialiser' is not used [-Werror,-Wunused-private-field]	Log

4 errors

Debian Package rebuild