Fixed build errors in the previous commits.

1 files changed, 1 insertions, 0 deletions

diff --git a/window.go b/window.go
index 127570b..d77fdd0 100644
--- a/window.go
+++ b/window.go
@@ -3,6 +3,7 @@
 package main
 
 import (
+	"fmt"
 	"sync"
 )