[OpenSIPS-Devel] [OpenSIPS/opensips] ab36f5: acc: Fix possible crash if 'aaa' module not loaded

[Liviu Chircu]

  Branch: refs/heads/3.4
  Home:   https://github.com/OpenSIPS/opensips
  Commit: ab36f59b2efd95d215a2c8f992336abe665de8eb
      https://github.com/OpenSIPS/opensips/commit/ab36f59b2efd95d215a2c8f992336abe665de8eb
  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.