[Bug libstdc++/77524] Empty std::deque allocates unnecessary heap memory

[d.rigby at me dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77524

--- Comment #2 from Dave Rigby <d.rigby at me dot com> ---
Hi Jonathan,

Thanks for the context - useful to know why the current behaviour is the case
(even if not ideal).