Add a shutdownWatch field in the HVMImageHandler constructor, to avoid error

messages if creation fails and the watch gets torn down.

Signed-off-by: Ewan Mellor <ewan@xensource.com>

tools/python/xen/xend/image.py

@@ -248,6 +248,11 @@ class PPC_LinuxImageHandler(LinuxImageHandler):
 
 class HVMImageHandler(ImageHandler):
 
+    def __init__(self, vm, imageConfig, deviceConfig):
+        ImageHandler.__init__(self, vm, imageConfig, deviceConfig)
+        self.shutdownWatch = None
+
+
     def configure(self, imageConfig, deviceConfig):
         ImageHandler.configure(self, imageConfig, deviceConfig)