changed started.

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/fork@1532 b32b6428-25c9-4566-ad07-03861ab6144f

lib/xaal/lib/core.py

@@ -287,6 +287,8 @@ class Engine(object):
 
     def start(self):
         """Start the core engine: send queue alive msg"""
+        if self.started:
+            return
         self.network.connect()
         for dev in self.devices:
             self.send_alive(dev)
@@ -297,7 +299,6 @@ class Engine(object):
         self.running = False
 
     def run(self):
-        if not self.started:
         self.start()
         self.running = True
         while self.running: