QtTest LoggerRegistry: fix UB (default-constructed std::atomic)HEADdev

Up to C++17 inclusive, a default-constructed std::atomic object can
only be initialized using std::atomic_init(), _not_ by .store().

While __cpp_lib_atomic_shared_ptr is a C++20 feature, when std::atomic
default construction has been fixed, compilers may implement these
feature in any order, and it's not much work to call the
std::atomic<T>(T) ctor in NSDMI instead of the default constructor, so
do that.

Amends a0303cc7c590ff17fb5b0a5975bff98669e42942.

Pick-to: 6.10 6.9 6.8
Change-Id: Id3148db0049ee4e16509c2bfd78c9f9ee145f269
Reviewed-by: David Faure <[email protected]>

0 files changed, 0 insertions, 0 deletions