Typo fix + small improvement in comment


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14377 a5019735-40e9-0310-863c-91ae7b9d1cf9
Check that vgdb ptrace actions do not cause a EINTR or whatever
to go out of the select syscall


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14378 a5019735-40e9-0310-863c-91ae7b9d1cf9