fix panic in catalog operator

Author: akihikokuroda

pkg/controller/operators/catalog/operator.go

@@ -1590,7 +1590,7 @@ func (o *Operator) syncInstallPlans(obj interface{}) (syncError error) {
 
 	// Attempt to unpack bundles before installing
 	// Note: This should probably use the attenuated client to prevent users from resolving resources they otherwise don't have access to.
-	if len(plan.Status.BundleLookups) > 0 {
+	if plan.Status.BundleLookups != nil && len(plan.Status.BundleLookups) > 0 {
 		unpacked, out, err := o.unpackBundles(plan)
 		if err != nil {
 			// Retry sync if non-fatal error