Make friend requests stateless

Messenger is slightly twisty when it comes to sending connection status
callbacks It will very likely need at the very least a partial refactor to
clean it up a bit. Toxcore shouldn't need void *userdata as deep as is
currently does.

(amend 1) Because of the nature of toxcore connection callbacks, I decided to
change this commit from statelessness for connections changes to statelessness
for friend requests. It's simpler this was and doesn't include doing anything
foolish in the time between commits.

group fixup because grayhatter doesn't want to do it

"arguably correct" is not how you write security sensitive code

Clear a compiler warning about types within a function.

1 files changed, 1 insertions, 1 deletions

diff --git a/toxcore/tox.h b/toxcore/tox.h
index 5d528e16..3747e228 100644
--- a/toxcore/tox.h
+++ b/toxcore/tox.h
@@ -1709,7 +1709,7 @@ typedef void tox_friend_request_cb(Tox *tox, const uint8_t *public_key, const ui
  *
  * This event is triggered when a friend request is received.
  */
-void tox_callback_friend_request(Tox *tox, tox_friend_request_cb *callback, void *user_data);
+void tox_callback_friend_request(Tox *tox, tox_friend_request_cb *callback);
 
 /**
  * @param friend_number The friend number of the friend who sent the message.