libxl: idl: use "dispose" rather than "destroy" for function to free IDL types

Destroy is an overloaded term which would commonly like to be used for actual
destructive operations, such as destroying a domain etc.

Dispose isn't a great term but it does the job.

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

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

@@ -246,7 +246,7 @@ int attrib__libxl_hwcap_set(PyObject *v, libxl_hwcap *pptr)
 int attrib__libxl_key_value_list_set(PyObject *v, libxl_key_value_list *pptr)
 {
     if ( *pptr ) {
-        libxl_key_value_list_destroy(pptr);
+        libxl_key_value_list_dispose(pptr);
         *pptr = NULL;
     }
     if ( v == Py_None )