From dff6cf1a83d9be8ea211f150db2c60d875ddafb9 Mon Sep 17 00:00:00 2001
From: Clint Shryock <clint@ctshryock.com>
Date: Mon, 22 Jun 2015 10:48:54 -0500
Subject: [PATCH] code tweak after review

---
 builder/amazon/ebs/step_cleanup_volumes.go | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/builder/amazon/ebs/step_cleanup_volumes.go b/builder/amazon/ebs/step_cleanup_volumes.go
index c66f9d786..56ebe5527 100644
--- a/builder/amazon/ebs/step_cleanup_volumes.go
+++ b/builder/amazon/ebs/step_cleanup_volumes.go
@@ -43,16 +43,17 @@ func (s *stepCleanupVolumes) Cleanup(state multistep.StateBag) {
 
 	ui.Say("Cleaning up any extra volumes...")
 
-	save := make(map[string]bool)
+	// We don't actually care about the value here, but we need Set behavior
+	save := make(map[string]struct{})
 	for _, b := range s.BlockDevices.AMIMappings {
 		if !b.DeleteOnTermination {
-			save[b.DeviceName] = true
+			save[b.DeviceName] = struct{}{}
 		}
 	}
 
 	for _, b := range s.BlockDevices.LaunchMappings {
 		if !b.DeleteOnTermination {
-			save[b.DeviceName] = true
+			save[b.DeviceName] = struct{}{}
 		}
 	}