Deleted/Replied to message fix

[johnjamesjacoby]

Patch to fix situation where a user deletes a message, and someone in the tread replies to it. Previously the message/thread was never unmarked as deleted. This patch fixes it quite easily.

Situation

---

Burt = user_id 3
John = user_id 2
Andy = user_id 1

Before

---

1. I message Andy and Burt.
2. I delete message in my sent box. (user_id = 2; is_deleted = 1)
3. Burt reads the message, and deletes (user_id = 3; is_deleted = 1)
4. Andy messages us back.
5. Message never shows up in my inbox. is_deleted still = 1
6. Message never shows up in Burt's inbox. is_deleted still = 1

After

---

1. I message Andy.
2. I delete message in my sent box. (user_id = 2; is_deleted = 1)
3. Burt reads the message, and deletes (user_id = 3; is_deleted = 1)
4. Andy messages us back. (user_id = 3,2; is_deleted = 0)
5. Burt and I both receive notifications of new messages and all is well.

Patch attached.

[johnjamesjacoby]

BP_Messages_Message::send fix

[DJPaul]

You, Sir, are a genius.

[apeatling]

(In [1689]) Fixes #911 props jjj.