isisd: prevent segfault in isis_circuit_af_set

before the last commit, it was possible under some
circumstances to call isis_circuit_af_set on a circuit
with a NULL area, e.g. if the circuit was deconfigured
due to a validation error. While this should not happen
now, let's add an explicit check to avoid crashing if
a regression is introduced.

Signed-off-by: Emanuele Di Pascale <emanuele@voltanet.io>

0 files changed, 0 insertions, 0 deletions