[qa] mininode: Catch exceptions in got_data

qa/rpc-tests/test_framework/mininode.py

@@ -1252,6 +1252,7 @@ class NodeConn(asyncore.dispatcher):
             self.sendbuf = self.sendbuf[sent:]
 
     def got_data(self):
+        try:
             while True:
                 if len(self.recvbuf) < 4:
                     return
@@ -1289,6 +1290,8 @@ class NodeConn(asyncore.dispatcher):
                 else:
                     self.show_debug_msg("Unknown command: '" + command + "' " +
                                         repr(msg))
+        except Exception as e:
+            print 'got_data:', repr(e)
 
     def send_message(self, message, pushbuf=False):
         if self.state != "connected" and not pushbuf: