typo

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

alpine/packages/hupper/main.go

@@ -37,7 +37,7 @@ func main() {
 	// 43 bytes is the record size of the watch
 	buf := make([]byte, 43)
 	// initial state
-	_, err := watch.Read(buf)
+	_, err = watch.Read(buf)
 	if err != nil {
 		log.Fatalln("Error reading watch file", err)
 	}