[wasm] Do not generate a loop stack check upon a decoder error.

test/mjsunit/regress/wasm/loop-stack-check.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
 
 (function() {
   var builder = new WasmModuleBuilder();
-  builder.addMemory(1, 1, false);
-  builder.addFunction("foo", kSig_i_v)
+  builder.addFunction("foo", kSig_i_ii)
     .addBody([
-              kExprI32Const, 00,
-              kExprMemorySize,
-              kExprBrIf, 00,
-              kExprMemorySize,
-              kExprBr, 0xe7, 0xd2, 0xf2, 0xff, 0x1d
+        kExprLoop, 00,
+        kExprBrTable, 0xfb, 0xff, 0xff, 0xff,
               ])
               .exportFunc();
   assertThrows(function() { builder.instantiate(); });
 })();