function readPlainInt32(reader, count) {
  const values = (reader.view.byteOffset + reader.offset) % 4
    ? new Int32Array(align(reader.view.buffer, reader.view.byteOffset + reader.offset, count * 4))
    : new Int32Array(reader.view.buffer, reader.view.byteOffset + reader.offset, count)
  reader.offset += count * 4
  return values
}
Read `count` int32 values.

@param {DataReader} reader
@param {number} count
@returns {Int32Array}