xend: don't drop device config on domain start failure

If domain creation in xend fails before devices are configured, e.g.
insufficient memory, device config is dropped from xend's managed
domain config.

Once xend is restarted, the domain's devices are lost.

This patch fixes a bug in XendConfig where only the device
controller was consulted for device configuration.

Signed-off-by: Jim Fehlig <jfehlig@novell.com>

tools/python/xen/xend/XendConfig.py

@@ -1171,8 +1171,8 @@ class XendConfig(dict):
                                     config.append(['VDI', dev_cfg.get('VDI', '')])
 
                                 sxpr.append(['device', config])
+                                found = True
 
-                            found = True
                         except:
                             log.exception("dumping sxp from device controllers")
                             pass