vchoi_fork

[svn-r3061] Purpose:
    Bug fix.
Description:
    Cray T3E (and J90?) was failing on partial I/O tests.  The bug was in
    the optimized hyperslab routines for cases where a hyperslab filled the
    temporary datatype conversion buffer and the optimized hyperslab routine
    needed to start in the middle of a hyperslab.
Solution:
    Corrected code to detect the situation and read in the correct amount of
    elements in the hyperslab.
Platforms tested:
    Cray T3E (mcurie.nersc.gov)