[OpenSIPS-Devel] [OpenSIPS/opensips] 385b7f: acc: fix leak when assinging empty string to extra

[Razvan Crainea]

  Branch: refs/heads/2.3
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 385b7f5919eb4d236eb6811f5f1a379414419119
      https://github.com/OpenSIPS/opensips/commit/385b7f5919eb4d236eb6811f5f1a379414419119
  Author: Razvan Crainea <razvan at opensips.org>
  Date:   2018-03-07 (Wed, 07 Mar 2018)

  Changed paths:
    M modules/acc/acc_extra.c
    M modules/acc/acc_logic.c
    M modules/acc/acc_vars.c

  Log Message:
  -----------
  acc: fix leak when assinging empty string to extra

Many thanks to Pete Kelly for reporting and offering testing environment
for this bug!

(cherry picked from commit 8d68f03c4e55293d07e7d14d500e6345a15da662)