sgsn: Deal with no static ggsn being configured at all

In case no static ggsn is configured the code would crash
with the assumption that there is always such a GGSN.
1 file changed
tree: 13948bb6b8d0032b815604f4c7a9f59185634c15
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. .gitignore
  7. README