Comment # 11 on bug 899627 from Stefan Br�ns

This change breaks building RPM packages with sources in 7z format

$> grep 7z  -r /usr/lib/rpm/macros*
/usr/lib/rpm/macros:%__7zip                     /usr/bin/7za

[   64s] + /usr/bin/7za x /home/abuild/rpmbuild/SOURCES/thedarkmod.2.06.src.7z
[   64s] /var/tmp/rpm-tmp.JmChGT: line 31: /usr/bin/7za: No such file or
directory