tools: Fix time offset when localtime=0

localtime can be stored in vm config as a string, resulting in
incorrect calculation of rtc_timeoffset.  Cast localtime to int
to ensure rtc_timeoffset is calculated properly.

Signed-off-by: Jim Fehlig <jfehlig@novell.com>
xen-unstable changeset:   21460:15f4ead9e686
xen-unstable date:        Wed May 26 08:15:31 2010 +0100

tools/python/xen/xend/image.py

@@ -129,7 +129,7 @@ class ImageHandler:
         self.dmargs = self.parseDeviceModelArgs(vmConfig)
         self.pid = None
         rtc_timeoffset = int(vmConfig['platform'].get('rtc_timeoffset', 0))
-        if vmConfig['platform'].get('localtime', 0):
+        if int(vmConfig['platform'].get('localtime', 0)):
             if time.localtime(time.time())[8]:
                 rtc_timeoffset -= time.altzone
             else: