Currently, only `chat_log_omemo_msg_out` can fail (i.e. return `NULL` instead of a stanza id). In this case, the message is neither printed to the chat window nor added to the log (since it wasn't sent).
Currently, only `chat_log_omemo_msg_out` can fail (i.e. return `NULL` instead of a stanza id). In this case, the message is neither printed to the chat window nor added to the log (since it wasn't sent).