Avoid failing if CPU features are missing

daemon-common/common.py

@@ -148,8 +148,11 @@ def getDomainExtraDetails(parsed_xml):
 #
 def getDomainCPUFeatures(parsed_xml):
     dfeatures = []
+    try:
         for feature in parsed_xml.features.getchildren():
             dfeatures.append(feature.tag)
+    except:
+        pass
 
     return dfeatures