Added UB comment r/t deleting a friend w/ active call

[GrayHatter]

This change is

[GrayHatter]

closes #147

[JFreegman]

toxcore/Messenger.c, line 417 at r1 (raw file):

    if (m->friend_connectionstatuschange_internal) {
        // This is a direct callback to tell ToxAV that the friend has disconnected.
        // The userdata in this callback is set to NULL. Which if there is an active

Weird fragmented sentence. Should say something like: "The userdata in this callback is set to NULL, which will get passed back to the user if there is an active call. This behavior is expected..."

---

Comments from Reviewable

[JFreegman]

---

Reviewed 1 of 1 files at r2.
Review status: all files reviewed at latest revision, 1 unresolved discussion.

---

Comments from Reviewable

[GrayHatter]

Review status: all files reviewed at latest revision, 1 unresolved discussion.

---

toxcore/Messenger.c, line 417 at r1 (raw file):

Previously, JFreegman wrote…

Weird fragmented sentence. Should say something like: "The userdata in this callback is set to NULL, which will get passed back to the user if there is an active call. This behavior is expected..."

Done.

---

Comments from Reviewable