Fix nil pointer derreference on AWS resource destroy (#200)

* Fix nil pointer derreference

* Restyled by gofmt

Co-authored-by: Restyled.io <commits@restyled.io>

Author: 0x2b3bfa0

iterative/aws/provider.go

@@ -355,6 +355,10 @@ func ResourceMachineDelete(ctx context.Context, d *schema.ResourceData, m interf
 			},
 		},
 	})
+	if err != nil {
+		return err
+	}
+
 	if len(descResult.Reservations) > 0 && len(descResult.Reservations[0].Instances) > 0 {
 		instanceID := *descResult.Reservations[0].Instances[0].InstanceId
 		_, err = svc.TerminateInstances(ctx, &ec2.TerminateInstancesInput{