jebsolutions b0bde877d1 fixes bug #2270 reported by volga629 (#2276) ...

Please do further testing/review and give comments and suggest cleanup, etc.

This bug is only tripped if all of the following are true:
a) fax send fails
b) email notification of fax failure also fails
c) Other?

how to test
- have a 100% working fax to email setup.
- Change Advanced->defaults->email and set the port to be something invalid.
- e.g. smtp port 9999 is invalid
- send a test fax to something without a fax
- e.g. I just faxed my own DID which does NOT have fax answering

- each time the phone rings answer...wait 5 seconds, and then hang up
- note: it will retry sending the fax 5 times so repeat the above.

- on the last try it will give up, and try to send the failure email
- the email will fail (bad port) and then it will insert the failed email into v_emails
- the insert will fail and nothing in v_emails

Error was caused by trying to insert '' into the domain_uuid field.
'' is invalid in a uuid field, but null is okay.

The null is caused by no x-headers being passed.  So these two fields end up null:
$headers["X-FusionPBX-Domain-UUID"]
$headers["X-FusionPBX-Email-Type"]

Ignoring unset/uninitialized variables hides bugs.

Fix: feed the X-Header in the calling lua code.

2016-12-27 17:49:57 -07:00

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