[Bug libstdc++/55047] operator() in std::exponential_distribution may call log(0)

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55047

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-24 12:21:17 UTC ---
Fixed in mainline. A similar fix will go in 4_7-branch in a few days.