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/bug012.go b/test/fixedbugs/bug012.go
index 41d1bf6..ffd5b55 100644
--- a/test/fixedbugs/bug012.go
+++ b/test/fixedbugs/bug012.go
@@ -10,6 +10,7 @@
 func main() {
 	var u30 uint64 = 0;
 	var u31 uint64 = 1;
+	_, _ = u30, u31;
 	var u32 uint64 = 18446744073709551615;
 	var u33 uint64 = +18446744073709551615;
 	if u32 != (1<<64)-1 { panic("u32\n"); }