gfe-relnote: fix UBSAN failure in QuicCircularDeque. No protected.
Some compiler doesn't like memcp 0 byte from nullptr
PiperOrigin-RevId: 294982580
Change-Id: If9bffc83bb692a83629128248c29bf83ec61eb67
QUICHE (QUIC, Http/2, Etc) is Google‘s implementation of QUIC and related protocols. It powers Chromium as well as Google’s QUIC servers and some other projects.