[OpenSIPS-Devel] [opensips] presence module: move strlen check to avoid pkg_malloc(0) (#831)

[James Criscuolo]

We made this change and found it to greatly improve reliability in our production environment. I also believe this was the intention of the code to begin with, but I could be wrong there. In general, it seems malloc'ing size 0 eventually leads to problems.
You can view, comment on, or merge this pull request online at:

  https://github.com/OpenSIPS/opensips/pull/831

-- Commit Summary --

  * presence module: move strlen check to avoid pkg_malloc(0)

-- File Changes --

    M modules/presence/notify.c (12)

-- Patch Links --

https://github.com/OpenSIPS/opensips/pull/831.patch
https://github.com/OpenSIPS/opensips/pull/831.diff

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