Fix xm block-configure, by allowing the device ID to be unspecified inside

device_configure (in which case it will be specified by the incoming config).

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

tools/python/xen/xend/XendDomainInfo.py

@@ -520,7 +520,7 @@ class XendDomainInfo:
         self._waitForDevice(dev_type, devid)
         return self.getDeviceController(dev_type).sxpr(devid)
 
-    def device_configure(self, dev_config, devid):
+    def device_configure(self, dev_config, devid = None):
         """Configure an existing device.
         
         @param dev_config: device configuration