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/Messenger.h b/toxcore/Messenger.h
index a59f8c4e..dc809a22 100644
--- a/toxcore/Messenger.h
+++ b/toxcore/Messenger.h
@@ -472,7 +472,7 @@ void m_callback_log(Messenger *m, logger_cb *function, void *userdata);
  *  Function format is function(uint8_t * public_key, uint8_t * data, size_t length)
  */
 void m_callback_friendrequest(Messenger *m, void (*function)(Messenger *m, const uint8_t *, const uint8_t *, size_t,
-                              void *), void *userdata);
+                              void *));
 
 /* Set the function that will be executed when a message from a friend is received.
  *  Function format is: function(uint32_t friendnumber, unsigned int type, uint8_t * message, uint32_t length)