avoid unlimited loop in scheduler

weboob/ouiboube.py

@@ -96,5 +96,8 @@ class Weboob:
     def repeat(self, interval, function, *args):
         return self.scheduler.repeat(interval, function, *args)
 
+    def want_stop(self):
+        return self.scheduler.want_stop()
+
     def loop(self):
         return self.scheduler.run()

weboob/scheduler.py

@@ -36,6 +36,8 @@ class Scheduler(object):
         self.running = True
         while self.running:
             self.scheduler.run()
+            if not self.scheduler.queue:
+                self.scheduler.delayfunc(0.001)
         return True
 
     def want_stop(self):