Fix typo

src/typedarray.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 68 matching lines @@
   var result = new $ArrayBuffer(newLen);
 
   %ArrayBufferSliceImpl(this, result, first);
   return result;
 }
 
 // --------------- Typed Arrays ---------------------
 
 function CreateTypedArrayConstructor(name, elementSize, arrayId, constructor) {
   function ConstructByArrayBuffer(obj, buffer, byteOffset, length) {
-    var offset = IS_UNDEFINED(byteOffset)
-      ? 0 : offset = TO_POSITIVE_INTEGER(byteOffset);
+    var offset = IS_UNDEFINED(byteOffset) ? 0 : TO_POSITIVE_INTEGER(byteOffset);
 
     if (offset % elementSize !== 0) {
       throw MakeRangeError("invalid_typed_array_alignment",
           "start offset", name, elementSize);
     }
     var bufferByteLength = %ArrayBufferGetByteLength(buffer);
     if (offset >= bufferByteLength) {
       throw MakeRangeError("invalid_typed_array_offset");
     }
 
@@ skipping 95 matching lines @@
 // arrayIds below should be synchronized with Runtime_TypedArrayInitialize.
 SetupTypedArray(1, "Uint8Array", global.Uint8Array, 1);
 SetupTypedArray(2, "Int8Array", global.Int8Array, 1);
 SetupTypedArray(3, "Uint16Array", global.Uint16Array, 2);
 SetupTypedArray(4, "Int16Array", global.Int16Array, 2);
 SetupTypedArray(5, "Uint32Array", global.Uint32Array, 4);
 SetupTypedArray(6, "Int32Array", global.Int32Array, 4);
 SetupTypedArray(7, "Float32Array", global.Float32Array, 4);
 SetupTypedArray(8, "Float64Array", global.Float64Array, 8);