Attached is a newer version of the patch which an 'xfree' moved to a
more appropriate place.

2013-12-30  Siva Chandra Reddy  <sivachandra@google.com>

        PR python/15464
        PR python/16133
        * valops.c (value_struct_elt_bitpos): New function
        * python/py-value.c (valpy_getitem): Use 'bitpos' attribute to
        look for a field when 'name' is 'None' or empty.

        testsuite/
        * gdb.python/py-value-cc.cc: Enhance test case.
        * gdb.python/py-value-cc.exp: Add new tests.