Log partition table content only if available.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2128 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/storage/app.py

@@ -151,7 +151,8 @@ class Application(object):
             logging.info('\nPre-mortem informations:')
             self.em.log()
             self.nm.log()
-            self.pt.log()
+            if self.pt is not None:
+                self.pt.log()
             self.tm.log()
             self.logQueuedEvents()
             raise