Handle all types of alerts on shutdown

There might be alerts already queued in buffer waiting to be handled at
the time of pausing the session, so don't skip over them.

src/base/bittorrent/sessionimpl.cpp

@@ -2916,8 +2916,9 @@ void SessionImpl::saveResumeData()
                 || (alertType == lt::save_resume_data_failed_alert::alert_type))
             {
                 hasWantedAlert = true;
-                handleAlert(a);
             }
+
+            handleAlert(a);
         }
 
         if (hasWantedAlert)