Test if there are pending message when looping.

This prevents from having an endless wait on "get" if the last connection
from which we were expecting answers got interrupted.
Note that this method will not raise any error related to this.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2028 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/client/app.py

@@ -212,9 +212,11 @@ class Application(object):
             If True (default), will block until at least one packet was
             received.
         """
-        get = self.local_var.queue.get
+        pending = self.dispatcher.pending
+        queue = self.local_var.queue
+        get = queue.get
         _handlePacket = self._handlePacket
-        while True:
+        while pending(queue):
             try:
                 conn, packet = get(block)
             except Empty: