Expression result unused - Rebuild of the Debian archive with clang

"Expression result unused" build failure(s)
clang 3.5.0

clang triggers a warning on this useless usage of the define. The -Werror causes the failure.

#define bar(int) (1)

void foo() {
    bar(2);
}

With gcc, this warning is only displayed with -Wall.

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	Bug report
libshevek	1.4-1	src/iostring.hh:728:3: error: expression result unused; should this cast be to 'void'? [-Werror,-Wunused-value]	Log	~~754323~~

1 errors

Debian Package rebuild