We haven't had a release in a month. More to the point, we
haven't had a regtest comparison in a month.
http://code.google.com/p/lilypond/issues/detail?id=1821
is not going away any time soon. It involves complicated stuff in
the build system, which nobody wants to touch.
As a temporary workaround, I will now reduce the number of
regression tests. This commit merges segfault fixes.