[USSD] various USSD improvements

- Improved handling of extension-number string (as per review)
- Guard against a buffer-overflow if mobile sends a too-long USSD
- declare some function-parameters const
- fix gsm_ts_name function to display the right BTS number (bts->nr rather than bts->bts_nr)
5 files changed
tree: e9b939fed62cc7b978fbb5477aea2169001587e8
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. wireshark/