Default initialize sleep callback duration in tr_verify_worker

[nevack]

std::chrono::duration is just a wrapper, underlying numerical value member will be default initialized to zero as expected.

See https://en.cppreference.com/w/cpp/chrono/duration

[Coeur]

21:53:44 The following tests FAILED:
21:53:44 112 - LT.DhtTest.callsPeriodicPeriodically (Failed)
21:53:44 305 - LT.TimerTest.repeatingHonorsInterval (Failed)
21:53:44 310 - LT.TimerTest.repeatingStop (Failed)

Could it be related to the change you made?

[tearfur]

I agree with the code change, just a nit though:

Strictly speaking, this is a form of "list-initialization" that leads to "value-initialization", so the commit message and PR title should be changed.

From https://en.cppreference.com/w/cpp/language/list_initialization:

Otherwise, if the braced-init-list is empty and T is a class type with a default constructor, value-initialization is performed.

From https://en.cppreference.com/w/cpp/language/value_initialization:

if T is a class type with a default constructor that is neither user-provided nor deleted (that is, it may be a class with an implicitly-defined or defaulted default constructor), the object is zero-initialized...

[ckerr]

Good catch. Thanks!