Also check for self.state.dead in the recvResponse().

Author: sobomax

sippy/UA.py

@@ -216,7 +216,7 @@ def processChallenge(self, resp, cseq, ch_hfname, auth_hfname, extra_headers):
         return True
 
     def recvResponse(self, resp, tr):
-        if self.state == None:
+        if self.state is None or self.state.dead:
             return
         self.update_ua(resp)
         code, reason = resp.getSCode()