fix vpc_origin

Author: kevcube

main.tf

@@ -133,7 +133,8 @@ resource "aws_cloudfront_distribution" "this" {
         for_each = origin.value.vpc_origin_config != null ? [origin.value.vpc_origin_config] : []
 
         content {
-          vpc_origin_id            = coalesce(vpc_origin_config.value.vpc_origin_id, aws_cloudfront_vpc_origin.this[origin.key].id)
+          vpc_origin_id = coalesce(vpc_origin_config.value.vpc_origin_id,
+          aws_cloudfront_vpc_origin.this[vpc_origin_config.value.vpc_origin].id)
           origin_keepalive_timeout = vpc_origin_config.value.origin_keepalive_timeout
           origin_read_timeout      = vpc_origin_config.value.origin_read_timeout
         }

variables.tf

@@ -151,10 +151,11 @@ variable "origin" {
     vpc_origin_config = optional(object({
       origin_keepalive_timeout = optional(number)
       origin_read_timeout      = optional(number)
-      vpc_origin_id            = optional(string) # If not provided, uses aws_cloudfront_vpc_origin.this
+      vpc_origin_id            = optional(string) # If not provided, uses aws_cloudfront_vpc_origin.this[this.vpc_origin].id
+      vpc_origin               = optional(string) # Custom parameter to lookup against aws_cloudfront_vpc_origin.this
     }))
   }))
-  default = null
+  default = {}
 }
 
 variable "origin_group" {