nat: Fix the filter when searching for a identity response

The filter code will return < 0 for error, 0 for unknown
subscriber, 1 for subscriber checked. Use the same if construct
as for the CR message. This should fix passing LU when it
starts with a TMSI of a different network.
1 file changed
tree: 0a6ceca0e38677f7361a989abceaafe37a030d26
  1. hlrsync/
  2. linux-kernel/
  3. openbsc/
  4. wireshark/