fix data type mismatch fix next hop lookup bug
fix data type mismatch
fix next hop lookup bug

still not very friendly with sos_ping because the seq_no is out of sync.
The current hack is to update with new seq_no.

The implementation does not handle endiness.  
This prevents PPC talks to mote.  


nesl/sos-2x,nesl/sos-2x,nesl/sos-2x,nesl/sos-2x,nesl/sos-2x,nesl/sos-2x,nesl/sos-2x,nesl/sos-2x