tiff: Clarity issue.
tiff: Clarity issue.

The final strip might actually be a `short read', if the provided
data doesn't evenly fit in the strip size.  Thus increasing by the
strip size might actually make our pointer extend beyond the end
of our buffer.

It shouldn't matter ever; since this should only happen on the
last strip, we should never write into the buffer after the
pointer gets invalidated.

git-svn-id: 353be9ac11a1e711854a13efcc2fc17d9d6b83e7@1258 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok