hdf5_der

[svn-r13038] Purpose: Fixed user reported bug

Description:
    In Attribute::read, H5Aread malloc's memory for the read data buffer,
    so Attribute::read shouldn't allocate the buffer, but needs to
    deallocate with HDfree.

    Fixed a typo in H5StrType.cpp, should pass PredType::C_S1 to "copy"
    instead of H5T_C_S1.

Platforms tested:
    AIX 5.1 (copper)
    Linux 2.6 (kagiso)
    SunOS 5.8 64-bit (sol)