CrashRecoveryContextCleanup - fix uninitialized variable warnings. NFCI.

/// a crash recovery context.

class CrashRecoveryContextCleanup {

protected:

  CrashRecoveryContext *context;

  CrashRecoveryContext *context = nullptr;

  CrashRecoveryContextCleanup(CrashRecoveryContext *context)

      : context(context), cleanupFired(false) {}

      : context(context) {}

public:

  bool cleanupFired;

  bool cleanupFired = false;

  virtual ~CrashRecoveryContextCleanup();

  virtual void recoverResources() = 0;

private:

  friend class CrashRecoveryContext;

  CrashRecoveryContextCleanup *prev, *next;

  CrashRecoveryContextCleanup *prev = nullptr, *next = nullptr;

};

/// Base class of cleanup handler that controls recovery of resources of the