gprs: Use 'Network failure' as default cause

This commit adds a check after a GSUP message has been decoded
whether it is an error message and does not contain a cause value.
If his is the case, the cause value is set to 'Network failure', so
that this cause if effectively the default value for error messages.

Sponsored-by: On-Waves ehf
2 files changed
tree: cd36eac91371ad1c9efb72e213381060edf754f4
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README