provider/aws: Only allow max. 1 health_check block for ELB

builtin/providers/aws/resource_aws_elb.go

@@ -169,6 +169,7 @@ func resourceAwsElb() *schema.Resource {
 				Type:     schema.TypeList,
 				Optional: true,
 				Computed: true,
+				MaxItems: 1,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{
 						"healthy_threshold": &schema.Schema{
@@ -590,9 +591,7 @@ func resourceAwsElbUpdate(d *schema.ResourceData, meta interface{}) error {
 
 	if d.HasChange("health_check") {
 		hc := d.Get("health_check").([]interface{})
-		if len(hc) > 1 {
-			return fmt.Errorf("Only one health check per ELB is supported")
-		} else if len(hc) > 0 {
+		if len(hc) > 0 {
 			check := hc[0].(map[string]interface{})
 			configureHealthCheckOpts := elb.ConfigureHealthCheckInput{
 				LoadBalancerName: aws.String(d.Id()),