[OpenSIPS-Devel] [OpenSIPS/opensips] 427b4a: acc: Fix possible crash if 'aaa' module not loaded

[Liviu Chircu]

  Branch: refs/heads/3.2
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 427b4a7ec3e4f0c0bba1c66e473b30992330f091
      https://github.com/OpenSIPS/opensips/commit/427b4a7ec3e4f0c0bba1c66e473b30992330f091
  Author: Liviu Chircu <liviu at opensips.org>
  Date:   2023-12-11 (Mon, 11 Dec 2023)

  Changed paths:
    M modules/acc/acc.c
    M modules/acc/acc.h
    M modules/acc/acc_logic.c

  Log Message:
  -----------
  acc: Fix possible crash if 'aaa' module not loaded

If do_accounting("aaa") is used without a backend module loaded,
OpenSIPS would actually start, then crash when generating an acc record.

Credits to Simon Gajski and Bogdan Iancu for reporting and diagnosing
the issue here.