fix "declared and not used" in tests;
also template/template.go, missed last time.

R=r
DELTA=116  (61 added, 10 deleted, 45 changed)
OCL=34620
CL=34622
diff --git a/test/fixedbugs/bug013.go b/test/fixedbugs/bug013.go
index 33b532b..4b10677 100644
--- a/test/fixedbugs/bug013.go
+++ b/test/fixedbugs/bug013.go
@@ -9,6 +9,7 @@
 func main() {
 	var cu0 uint16 = '\u1234';
 	var cU1 uint32 = '\U00101234';
+	_, _ = cu0, cU1;
 }
 /*
 bug13.go:4: missing '