Description:
    Correct error in new hyperslab selection test to use the right # of
dimensions for start/stride/count/block arrays.  Also, switch H5Sselect_select
to H5Smodify_select.

Tested on:
    MacOSX/64 10.9.3 (amazon) w/gcc 4.9.1, OpenMPI, C++, FORTRAN & threadsafe
    (Too minor to require h5committest)


git-svn-id: https://svn.hdfgroup.uiuc.edu/hdf5/trunk@25283 dab4d1a6-ed17-0410-a064-d1ae371a2980