Description: Function prototype H5E_walk_t and structure H5E_error_t wasn't backward
compatible.
Solution: Make them compatible with v1.6 and provide new definitions of H5E_walk_stack_t
and H5E_error_stack_t.
Platforms tested: fuss and h5committest.
Description: The error stack was accidentally cleared during the program.
Solution: Change it to the correct output.
Platforms tested: RH 8(fuss). Simple change.
Misc. update: