[Bug sanitizer/61422] False Asan positive in libopus

[m.zakirov at samsung dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61422

--- Comment #1 from Marat Zakirov <m.zakirov at samsung dot com> ---
Created attachment 32896
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32896&action=edit
Proposed patch

Only tested with asan testsuite on x64.