[OpenSIPS-Devel] [OpenSIPS/opensips] 4a1390: AVP printing: Properly print NULL AVP fields

[Liviu Chircu]

  Branch: refs/heads/2.4
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 4a1390b8e7f454039af638e3eea7d7a7aacf064a
      https://github.com/OpenSIPS/opensips/commit/4a1390b8e7f454039af638e3eea7d7a7aacf064a
  Author: Liviu Chircu <liviu at opensips.org>
  Date:   2019-05-20 (Mon, 20 May 2019)

  Changed paths:
    M pvar.c

  Log Message:
  -----------
  AVP printing: Properly print NULL AVP fields

AVPs such as ["foo", NULL, "bar"], which are only made possible by a few
select modules (e.g. Redis) were crashing in $(avp(foo)[*]).

(cherry picked from commit e66486fbd2398fbf81b893b727ebb03074f23ab0)