corex: check not in SHM before PKG free for path

[smititelu]

Do the same for reset_path_vector() in core msg parser.

Pre-Submission Checklist

• Commit message has the format required by CONTRIBUTING guide
• Commits are split per component (core, individual modules, libs, utils, ...)
• Each component has a single commit (if not, squash them into one commit)
• No commits to README files for modules (changes must be done to docbook files
  in doc/ subfolder, the README file is autogenerated)

Type Of Change

• Small bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would change existing functionality)

Checklist:

• PR should be backported to stable branches
• Tested changes locally
• Related to issue core: parser reset_path_vector() remove check for msg->msg_flags #1144

Description

Hi,

Please have a look on this old discussion: https://lists.kamailio.org/pipermail/sr-dev/2018-July/047190.html

We have been using the shm_address_in() since then and no other apparent issue found since then.

Please let me know what you think. Also let me know if I can backport this to 5.3.

Thank you,
Stefan

[miconda]

Fine to merge and backport, thanks!

[henningw]

Thanks Stefan, if necessary please also backport to 5.2 branch.

[henningw]

done