Serious (and I *mean* serious) attempt to fix little/bigendian RPC issues.

Serious (and I *mean* serious) attempt to fix little/bigendian RPC issues.
We were reading the endainness in the RPC header and then never propagating
it to the internal parse_structs used to parse the data.
Also removed the "align" argument to prs_init as it was *always* set to
4, and if needed can be set differently on a case by case basis.
Now ready for AS/U testing when Herb gets it set up :-).
Jeremy.