[Xen-changelog] Avoid specifying bogus DISPLAY=None when spawning device model.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User jrb44@xxxxxxxxxxxxxxxxx
# Node ID 6f5b94da963a9651814ecd1d112db5e5082f5c81
# Parent  1e7bbbdff402b35b77b34c42e3c57eeb3d4dcd93
Avoid specifying bogus DISPLAY=None when spawning device model.

Signed-off-by: James Bulpin <james@xxxxxxxxxxxxx>

diff -r 1e7bbbdff402 -r 6f5b94da963a tools/python/xen/xend/image.py
--- a/tools/python/xen/xend/image.py    Thu Oct 20 11:35:57 2005
+++ b/tools/python/xen/xend/image.py    Thu Oct 20 18:37:41 2005
@@ -311,7 +311,8 @@
                   "-m", "%s" % (self.vm.getMemoryTarget() / 1024)])
         args = args + self.dmargs
         env = dict(os.environ)
-        env['DISPLAY'] = self.display
+        if self.display:
+            env['DISPLAY'] = self.display
         log.info("spawning device models: %s %s", self.device_model, args)
         self.pid = os.spawnve(os.P_NOWAIT, self.device_model, args, env)
         log.info("device model pid: %d", self.pid)

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