failed ppc64el build of libwnck 2.30.7-1

[Debian buildds]

 * Source package: libwnck
 * Version: 2.30.7-1
 * Architecture: ppc64el
 * State: failed
 * Suite: sid
 * Builder: ppc64el1.debian.net
 * Build log: https://buildd.debian.org/fetch.cgi?pkg=libwnck&arch=ppc64el&ver=2.30.7-1&stamp=1409522421&file=log

Please note that these notifications do not necessarily mean bug reports
in your package but could also be caused by other packages, temporary
uninstallabilities and arch-specific breakages.  A look at the build log
despite this disclaimer would be appreciated however.