Fix python 2.5 specific code (Andrew Gillies)

AUTHORS

@@ -46,6 +46,7 @@ Further patches have been submitted by:
   S. Çağlar Onur <caglar-at-pardus-dot-org-dot-tr>
   Claes Strom <cs-at-clabbe-dot-com>
   Mike MacCana <mmaccana-at-au1-dot-ibm-dot-com>
+  Andrew Gillies <anaru-at-main-dot-com>
 
   <...send a patch & get your name here...>
 

src/virtManager/domain.py

@@ -660,6 +660,7 @@ class vmmDomain(gobject.GObject):
         doc = None
         ctx = None
         ret = []
+        try:
             try:
                 doc = libxml2.parseDoc(self.get_xml())
                 ctx = doc.xpathNewContext()