hdf5_chunking_query_bmr

[svn-r25215] Description:
    Bring changes from Coverity branch back to trunk:

r20914:
    Use HDstrncpy and HDstrncat! --gh

20915:
    Use HDstrncpy and HDstrncat! --gh

Tested on:
    Mac OSX/64 10.9.3 (amazon) w/gcc 4.9.0, C++, FORTRAN & parallel
    (too minor to require h5committest)