fix sending candidates and computing hash in jingle file transfer. Fixes #7669

src/common/jingle_ft.py

@@ -110,7 +110,7 @@ class JingleFileTransfer(JingleContent):
                    STATE_TRANSPORT_REPLACE : StateTransportReplace(self),
               STATE_CAND_SENT_AND_RECEIVED : StateCandSentAndRecv(self)
         }
-        
+
         if jingle_xtls.PYOPENSSL_PRESENT:
             cert_name = os.path.join(configpaths.gajimpaths['MY_CERT'],
                                      jingle_xtls.SELF_SIGNED_CERTIFICATE)

src/common/jingle_transport.py

@@ -69,7 +69,7 @@ class JingleTransport(object):
         candidates is None)
         """
         if not candidates:
-            candidates = self._iter_candidates()
+            candidates = list(self._iter_candidates())
         else:
             candidates = (self.make_candidate(candidate) for candidate in candidates)
         transport = nbxmpp.Node('transport', payload=candidates)