Jeffrey Czyz ad71548822 Fix compilation errors in support/lockedpool.cpp
Changes in #12048 cause a compilation error in Arena::walk() when
ARENA_DEBUG is defined. Specifically, Arena's chunks_free map was
changed to have a different value type.

Additionally, missing includes cause other compilation errors when
ARENA_DEBUG is defined.

Reproduced with:

make CPPFLAGS=-DARENA_DEBUG
2019-11-16 08:44:42 -08:00
..
2018-07-27 07:15:02 -04:00