Fix conversion of FP to size_t.
Fix conversion of FP to size_t.

The RH compiler was the only one to catch (somehow?) that we were
the FP range as the number of bins required for a particular
dataset.  Of course, the range of the data has no implication as
to the number of bins needed for FP data.

Add a workaround so that we consider the number of required bins
"huge" when we see FP data.

git-svn-id: 353be9ac11a1e711854a13efcc2fc17d9d6b83e7@1647 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok