"Empty character constant " build failure(s) — clang 2.9

PackageVersionSupposed error messageFull log Bug report
gmerlin-avdecoder 1.1.0~dfsg-3demux_wve.c:30:33: error: empty character constant Log
xcftools 1.0.7-2./options.i:190:63: error: empty character constant Log

2 errors