A scalar field is not initialized by the constructor

Defect 105094 (STATIC_C)
Checker UNINIT_CTOR (subcategory none)
File: /src/mongo/db/free_mon/free_mon_queue.h
Function mongo::FreeMonMessageQueue::FreeMonMessageQueue(bool)
/src/mongo/db/free_mon/free_mon_queue.h, line: 150
Class member declaration for "_counter".

        uint64_t _counter;

/src/mongo/db/free_mon/free_mon_queue.h, line: 106
Non-static class member "_counter" is not initialized in this constructor nor in any functions that it calls.

        FreeMonMessageQueue(bool useCrankForTest = false) : _useCrank(useCrankForTest) {}