Fix test.

Author: ChrisHines

stackinternal_test.go

@@ -55,7 +55,7 @@ func TestTrace(t *testing.T) {
 
 	cs := fh.labyrinth()
 
-	lines := []int{50, 41, 55}
+	lines := []int{50, 41, 56}
 
 	for i, line := range lines {
 		if got, want := cs[i].line(), line; got != want {