[OpenSIPS-Devel] [OpenSIPS/opensips] 462652: Fixed crash if send_subscribe fails early

[Saúl Ibarra Corretgé]

  Branch: refs/heads/1.10
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 4626525912baea2942fdaa40f737baae5fcd73ee
      https://github.com/OpenSIPS/opensips/commit/4626525912baea2942fdaa40f737baae5fcd73ee
  Author: Saúl Ibarra Corretgé <saghul at gmail.com>
  Date:   2013-08-07 (Wed, 07 Aug 2013)

  Changed paths:
    M modules/pua/send_subscribe.c

  Log Message:
  -----------
  Fixed crash if send_subscribe fails early

In that case presentity is still NULL, check for it
(cherry picked from commit 6e3b16ec6d3fe59b5a1b415b548394be401e69af)