don't save None as service reference

diff --git a/ServiceReference.py b/ServiceReference.py
index 238e7f6..787c5c4 100644 (file)
--- a/ServiceReference.py
+++ b/ServiceReference.py
@@ -5,8 +5,8 @@ import NavigationInstance
 
 class ServiceReference(eServiceReference):
        def __init__(self, ref):
-               if isinstance(ref, str):
-                       self.ref = eServiceReference(ref)
+               if not isinstance(ref, eServiceReference):
+                       self.ref = eServiceReference(ref or "")
                else:
                        self.ref = ref
                self.serviceHandler = eServiceCenter.getInstance()
@@ -16,10 +16,7 @@ class ServiceReference(eServiceReference):
        
        def getServiceName(self):
                info = self.info()
-               if info is None:
-                       return None
-               
-               return info.getName(self.ref)
+               return info and info.getName(self.ref) or ""
 
        def play(self):
                return self.serviceHandler.info(self.ref)