m/cli/metroctl: fix nil pointer for "node describe"

Closes monogon-dev/monogon#293

Change-Id: Ic2397c3a145f39d0d41d1e74a7d18fce98606043
Reviewed-on: https://review.monogon.dev/c/monogon/+/2826
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/metropolis/cli/metroctl/table_node.go b/metropolis/cli/metroctl/table_node.go
index baa8776..4af9f2c 100644
--- a/metropolis/cli/metroctl/table_node.go
+++ b/metropolis/cli/metroctl/table_node.go
@@ -50,7 +50,7 @@
 	}
 	res.Add("tpm", tpm)
 
-	if n.Status.Version != nil {
+	if n.Status != nil && n.Status.Version != nil {
 		res.Add("version", version.Semver(n.Status.Version))
 	}