Fix earlier tclap fix -- no need for size_t on win32.
Fix earlier tclap fix -- no need for size_t on win32.

git-svn-id: 0a20d38d1bcdb3210d244a647211d61b0aabf366@138 5b8196f7-c1c0-4be6-8b13-4feed349168d

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok