message: Ensure buffers are always mappable for read to fetch data on replay
diff: @@ -410,6 +410,8 @@ bool WrappedOpenGL::Serialise_glNamedBufferStorageEXT(SerialiserType &ser, GLuin
  // can't have coherent without persistent, so remove as well
  flags &= ~GL_MAP_COHERENT_BIT;
  + flags |= GL_MAP_READ_BIT;
  +
  GL.glNamedBufferStorageEXT(buffer.name, (GLsizeiptr)bytesize, data, flags);
  m_Buffers[GetResourceManager()->GetID(buffer)].size = bytesize;
  