[Bug libstdc++/60308] [4.9 Regression] std::deque leaks memory

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60308

--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
Seems to be my fault in r202781:
       _Deque_base(const allocator_type& __a)
       : _M_impl(__a)
-      { }
+      { _M_initialize_map(0); }