Fix tools/test.py to allow CTRL+C to work correctly again.

test/sputnik/testcfg.py

 # Copyright 2009 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 39 matching lines @@
     out = output.stdout
     return "SputnikError" in out
 
   def BeforeRun(self):
     self.tmpfile = sputnik.TempFile(suffix='.js', prefix='sputnik-', text=True)
     self.tmpfile.Write(self.GetSource())
     self.tmpfile.Close()
 
   def AfterRun(self, result):
     # Dispose the temporary file if everything looks okay.
-    if not result.HasPreciousOutput(): self.tmpfile.Dispose()
+    if result is None or not result.HasPreciousOutput(): self.tmpfile.Dispose()
     self.tmpfile = None
 
   def GetCommand(self):
     result = self.context.GetVmCommand(self, self.mode)
     result.append(self.tmpfile.name)
     return result
 
   def GetLabel(self):
     return "%s sputnik %s" % (self.mode, self.GetName())
 
@@ skipping 33 matching lines @@
     return ['sample', 'sample=shell']
 
   def GetTestStatus(self, sections, defs):
     status_file = join(self.root, 'sputnik.status')
     if exists(status_file):
       test.ReadConfigurationInto(status_file, sections, defs)
 
 
 def GetConfiguration(context, root):
   return SputnikTestConfiguration(context, root)