Revert "simplify"

This reverts commit 34adb7c.

Author: gurgunday

lib/buffer.js

@@ -615,8 +615,8 @@ Buffer.concat = function concat(list, length) {
       TypedArrayPrototypeSet(buffer, buf, pos);
     } else {
       const src = new Uint8Array(
-        buf.buffer,
-        buf.byteOffset,
+        TypedArrayPrototypeGetBuffer(buf),
+        TypedArrayPrototypeGetByteOffset(buf),
         toCopy,
       );
       TypedArrayPrototypeSet(buffer, src, pos);