vchoi_fork

[svn-r6000] Purpose:
    Bug fix (ID 765 and part of ID 841)
Description:
    "h5dump -H" would core dump.  It was because the code was not
    checking if there was any file argument after option parsing.
    It referred to an non-existing filename argument.
    There was also some very old but not commented code which allowed
    the use of back slash to escape a filename begun with '-'.  The
    '--' option is better and more common practice.
Solution:
    Added code to check if there is still a filename argument after parsing.
    (This checking probably should goto inside the option_parsing routine.
    Also removed that old code mentioned above.
Platforms tested:
    eirene, arabica and modi4