Encoding 0 length data, returns '' instead of null

src/node.cc

@@ -170,7 +170,7 @@ enum encoding ParseEncoding(Handle<Value> encoding_v, enum encoding _default) {
 Local<Value> Encode(const void *buf, size_t len, enum encoding encoding) {
   HandleScope scope;
 
-  if (!len) return scope.Close(Null());
+  if (!len) return scope.Close(String::Empty());
 
   if (encoding == BINARY) {
     const unsigned char *cbuf = static_cast<const unsigned char*>(buf);

src/node_child_process.cc

@@ -200,7 +200,9 @@ void ChildProcess::on_read(evcom_reader *r, const void *buf, size_t len) {
   enum encoding encoding = isSTDOUT ?
     child->stdout_encoding_ : child->stderr_encoding_;
 
-  Local<Value> data = Encode(buf, len, encoding);
+  // TODO emit 'end' event instead of null.
+
+  Local<Value> data = len ? Encode(buf, len, encoding) : Local<Value>::New(Null());
   child->Emit(isSTDOUT ? output_symbol : error_symbol, 1, &data);
   child->MaybeShutdown();
 }