src/logging_unittest.cc:591: warning: dereferencing type-punned pointer will break strict-aliasing rules

As we'll never dereference the casted pointers, it's OK to silence this warning.


git-svn-id: https://google-glog.googlecode.com/svn/trunk@67 eb4d4688-79bd-11dd-afb4-1d65580434c0