im: fix message engine confirmation

Change-Id: I88615fdc6441e693eac8a5cdde432d5654421515
Tuleap: #647

src/ringdht/ringaccount.cpp

@@ -1423,6 +1423,8 @@ RingAccount::sendTextMessage(const std::string& to, const std::map<std::string,
         dht_.listen<dht::ImMessage>(h, [wshared,token](dht::ImMessage&& msg) {
             if (auto this_ = wshared.lock()) {
                 // check expected message confirmation
+                if (msg.id != token)
+                    return true;
                 auto e = this_->sentMessages_.find(msg.id);
                 if (e == this_->sentMessages_.end()) {
                         RING_DBG("Message not found for %llu", token);