Only introduce domain to the store when we have store channel _and_ mfn.

Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>

tools/python/xen/xend/XendDomainInfo.py

@@ -583,7 +583,7 @@ class XendDomainInfo:
         self.create_channel()
         self.image.createImage()
         self.exportToDB()
-        if self.store_channel:
+        if self.store_channel and self.store_mfn >= 0:
             self.db.introduceDomain(self.id,
                                     self.store_mfn,
                                     self.store_channel)