Fix /dtmf command

src/common/jingle_rtp.py

@@ -123,14 +123,14 @@ class JingleRTPContent(JingleContent):
         if self._dtmf_running:
             raise Exception # TODO: Proper exception
         self._dtmf_running = True
-        self._start_dtmf(events.pop(0))
-        gobject.timeout_add(500, self._next_dtmf, events)
+        self._start_dtmf(events[-1])
+        gobject.timeout_add(500, self._next_dtmf, events[:-1])
 
     def _next_dtmf(self, events):
         self._stop_dtmf()
         if events:
-            self._start_dtmf(events.pop(0))
-            gobject.timeout_add(500, self._next_dtmf, events)
+            self._start_dtmf(events[-1])
+            gobject.timeout_add(500, self._next_dtmf, events[:-1])
         else:
             self._dtmf_running = False