nat: Use the link_id from the original message in the new DTAP message

SMS went from SAPI=3 to SAPI=0 and nobody notices on the NAT->MSC direction.
2 files changed
tree: cce882498a7e10404ab792eb697352e78bae76c9
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. wireshark/
  5. README