Make sure we don't try to go down further after the leave walk already
ended. This fixes a crash with a new VM test.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Tested-by:  Rex Zhu Rex.Zhu@amd.com
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>