Fix typo.

ccnode/hypervisor/__init__.py

@@ -103,7 +103,7 @@ class Handler(HostHandler):
         return self.hypervisor.vm_define(data)
 
     def vm_undefine(self, name):
-        logger.debug('VM undefin')
+        logger.debug('VM undefine')
         vm = self.hypervisor.domains.get(name)
         if vm is not None:
             vm.undefine()