#### Pre-Submission Checklist
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- [x] Commit message has the format required by CONTRIBUTING guide
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- [x] Each component has a single commit (if not, squash them into one commit)
- [x] No commits to README files for modules (changes must be done to docbook 
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in `doc/` subfolder, the README file is autogenerated)

#### Type Of Change
- [x] 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:
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- [ ] PR should be backported to stable branches
- [ ] Tested changes locally
- [ ] Related to issue #XXXX (replace XXXX with an open issue number)

#### Description
After enabling the Topos module, we ran into a bit of trouble with early 
in-dialog notifies. We use the `event: talk` package from Cisco Broadsoft to be 
able to do call control, as described in chapter 6 here: 
https://pubhub.devnetcloud.com/media/broadsoft-docs/docs/pdf/BW-SIPAccessSideExtensionsInterfaceSpec.pdf

This will send a NOTIFY with a header `Event: talk` before the first `200 OK`. 
Currently this doesn't work with the topos module, since the NOTIFY method 
without a B-side contact will not check the INVITE record. When added to those 
methods in `tps_msg.c`, it tries to check the SUBSCRIBE for all NOTIFY's in 
`tps_storage.c`. The NOTIFY with  `Event: talk` will follow on an INVITE, so 
there was a small change needed there.

I've limited it to just the NOTIFY's with the `Event: talk` header, to 
minimize any impact.

You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/3627

-- Commit Summary --

  * topos: add compatiblity for early in-dialog NOTIFY

-- File Changes --

    M src/modules/topos/tps_msg.c (5)
    M src/modules/topos/tps_storage.c (3)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3627.patch
https://github.com/kamailio/kamailio/pull/3627.diff

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