Warning fix

src/uas/QGCUASFileManager.cc

@@ -73,6 +73,8 @@ QGCUASFileManager::QGCUASFileManager(QObject* parent, UASInterface* uas) :
 {
     bool connected = connect(&_ackTimer, SIGNAL(timeout()), this, SLOT(_ackTimeout()));
     Q_ASSERT(connected);
+
+    Q_UNUSED(connected);
 }
 
 /// @brief Calculates a 32 bit CRC for the specified request.
@@ -357,4 +359,4 @@ void QGCUASFileManager::_sendRequest(Request* request)
     // FIXME: Send correct system id instead of harcoded 250
     mavlink_msg_encapsulated_data_pack(250, 0, &message, _encdata_seq, (uint8_t*)request);
     _mav->sendMessage(message);
-}
\ No newline at end of file
+}