vchoi_fork

[svn-r1801] Purpose:
    Bug fix.
Description:
    If the H4DUMP (hdp) is not executable for some reasons (e.g., not
    in $PATH), it produced zero sized files.  The test script did not
    detect the abnormality but compared the zero sized files the same
    and concluded the test passed.
Solution:
    Test if H4DUMP can produce valid output.  If not, print warning
    messages.  Also check the size of output files to make sure they
    are reasonably valid.
Platform tested:
    Linux.