- cannot declare local variable named like a constant in outer scope

- submitted per discussion w/ ken

TBR=ken
DELTA=25  (25 added, 0 deleted, 0 changed)
OCL=27824
CL=27826

test/bugs/bug144.go

+// $G $D/$F.go || echo BUG should compile
+
+// 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
+
+const c = 1;
+
+func main() {
+	c := 0;
+}
+
+/*
+bug144.go:8: left side of := must be a name
+bug144.go:8: operation LITERAL not allowed in assignment context
+bug144.go:8: illegal types for operand: AS
+	ideal
+	int
+*/

test/golden.out

@@ -121,6 +121,14 @@ bugs/bug140.go:6: syntax error near L1
 bugs/bug140.go:7: syntax error near L2
 BUG should compile
 
+=========== bugs/bug144.go
+bugs/bug144.go:8: left side of := must be a name
+bugs/bug144.go:8: operation LITERAL not allowed in assignment context
+bugs/bug144.go:8: illegal types for operand: AS
+	ideal
+	int
+BUG should compile
+
 =========== fixedbugs/bug016.go
 fixedbugs/bug016.go:7: constant -3 overflows uint