Removed error returns from Control.preferredSize() since errors are not going to be returned anymore.

1 files changed, 1 insertions, 1 deletions

diff --git a/control.go b/control.go
index 3f54afe..2513399 100644
--- a/control.go
+++ b/control.go
@@ -9,5 +9,5 @@ import (
 type Control interface {
 	make(window *sysData) error
 	setRect(x int, y int, width int, height int, winheight int) error
-	preferredSize() (width int, height int, err error)
+	preferredSize() (width int, height int)
 }