cfg_bts_si2quater_neigh_add(): Don't call strerror() on negative value

Change-Id: I1300eede3f22df812b7e83902327ce4cde21aa35
Fixes: Coverity CID 135185
1 file changed
tree: cccde57b8ba351e4590edfc57cd92b02b7e84540
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap