[OpenSIPS-Devel] [OpenSIPS/opensips] c477a5: [dialog] fix bad unref leading to dialog leaking

[Bogdan Andrei IANCU]

  Branch: refs/heads/3.3
  Home:   https://github.com/OpenSIPS/opensips
  Commit: c477a5f61da772f058864f8adc2cfec007d31ce4
      https://github.com/OpenSIPS/opensips/commit/c477a5f61da772f058864f8adc2cfec007d31ce4
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2022-09-14 (Wed, 14 Sep 2022)

  Changed paths:
    M modules/dialog/dlg_handlers.c

  Log Message:
  -----------
  [dialog] fix bad unref leading to dialog leaking

When using the dlg_on_timeout to set a new timeout for the dialog, due to the timer related operations (re-inserting in the list), an extra ref cnt happens. If not unref'ed, the dialog will stay (as terminated) forever in memory.

Closes #2788

(cherry picked from commit 4062de45d0ccfe62bb4f9475f6320d2726349bab)