[OpenSIPS-Devel] [OpenSIPS/opensips] 3e03f2: Fix internal detection of DUMMY messages.

[Bogdan Andrei IANCU]

  Branch: refs/heads/3.1
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 3e03f2b509227cbfdfc36e21819fa19be218d4d6
      https://github.com/OpenSIPS/opensips/commit/3e03f2b509227cbfdfc36e21819fa19be218d4d6
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2021-04-12 (Mon, 12 Apr 2021)

  Changed paths:
    M action.c
    M action.h
    M modules/topology_hiding/topo_hiding_logic.c

  Log Message:
  -----------
  Fix internal detection of DUMMY messages.

Closes #2464

(cherry picked from commit faafd673dddf2c0784e570565c2c18dcb5520f36)