bug: empty statement not properly recognized in conjunction w/ labels

R=r
DELTA=14  (14 added, 0 deleted, 0 changed)
OCL=24610
CL=24610

test/bugs/bug136.go

+// errchk $G $D/$F.go
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+func main() {
+	L: ;  // ';' terminates empty statement => L does not apply to for loop
+	for i := 0; i < 10; i++ {
+		println(i);
+		break L  // L does not apply to for loop
+	}
+}

test/golden.out

@@ -163,6 +163,9 @@ BUG: should not compile
 =========== bugs/bug132.go
 BUG: compilation succeeds incorrectly
 
+=========== bugs/bug136.go
+BUG: should not compile
+
 =========== fixedbugs/bug016.go
 fixedbugs/bug016.go:7: overflow converting constant to uint