libxl: remove XS transaction from public API.

All external users pass 0 anyway so make the version of
libxl_domain_rename which takes a transaction internal and provide an
external facing function which does not expose a transaction.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

tools/python/xen/lowlevel/xl/xl.c

@@ -1,6 +1,6 @@
 /******************************************************************************
  * xl.c
- * 
+ *
  * Copyright (c) 2010 Citrix Ltd.
  * Author: Gianni Tedesco
  *
@@ -481,7 +481,7 @@ static PyObject *pyxl_domain_rename(XlObject *self, PyObject *args)
     int domid;
     if ( !PyArg_ParseTuple(args, "is|s", &domid, &new_name, &old_name) )
         return NULL;
-    if ( libxl_domain_rename(&self->ctx, domid, old_name, new_name, 0) ) {
+    if ( libxl_domain_rename(&self->ctx, domid, old_name, new_name) ) {
         PyErr_SetString(xl_error_obj, "cannot rename domain");
         return NULL;
     }