[wasm] Rework encoding of local declarations.

test/mjsunit/wasm/ffi-error.js

Index: test/mjsunit/wasm/ffi-error.js
diff --git a/test/mjsunit/wasm/ffi-error.js b/test/mjsunit/wasm/ffi-error.js
index ed6aa2542810fa7dc804fcc1e88f1e13d3b677fe..2eb70b9dad27efdfb8af916f5c10833c9fa155f9 100644
--- a/test/mjsunit/wasm/ffi-error.js
+++ b/test/mjsunit/wasm/ffi-error.js
@@ -7,7 +7,7 @@
 load("test/mjsunit/wasm/wasm-constants.js");
 
 function testCallFFI(ffi) {
-  var kBodySize = 6;
+  var kBodySize = 7;
   var kNameAddOffset = kHeaderSize + 28 + kBodySize + 1;
   var kNameMainOffset = kNameAddOffset + 4;
 
@@ -28,6 +28,7 @@ function testCallFFI(ffi) {
     kNameMainOffset, 0, 0, 0,   // name offset
     kBodySize, 0,
     // main body
+    kDeclNoLocals,
     kExprCallFunction, 0,       // --
     kExprGetLocal, 0,           // --
     kExprGetLocal, 1,           // --