hdf5_msb

[svn-r3632] 
Purpose:
    a bug fix on windows(possible on other platforms)
Description:
    not allocating enough space for a string at dump_all for debug version
    a string tmp is defined at dump_all(....),
    The memory that is allocated to tmp is malloc(strlen(prefix)+strlen(name)+1);
    However, there is one testing case : strlen(prefix) is 0 and
    tmp is allocated in the following:
    strcat(tmp,"/");
    strcat(tmp,name);
    ....
    free(tmp);

    the program fails when freeing tmp for debug (dll) version on windows 2000


Solution:
     For windows platform:

    allocate memory     strlen(prefix)+strlen(name)+2
Platforms tested:
    [machines you have tested the changed version.  This is absolute
    important.  Test it out on at least two or three different platforms
    such as Big-endian-32bit (SUN/IRIX), little-endian-32(LINUX) and
    64-bit (IRIX64/UNICOS/DEC-ALPHA) would be good.]