am b871b1a0: (-s ours) am 3f83b3fd: DO NOT MERGE opengl: Fix QemuPipeStream::readFully reading beyond end of buffer

* commit 'b871b1a06e24cc8ce863a2ab5a8fb4a4dcc85e1d':
  DO NOT MERGE opengl: Fix QemuPipeStream::readFully reading beyond end of buffer