Tidy this up for the 3.10.0 beta.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14425 a5019735-40e9-0310-863c-91ae7b9d1cf9
Add a clarifying comment.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14426 a5019735-40e9-0310-863c-91ae7b9d1cf9