tst_qtconcurrentrun: fix UB (uninit'ed values)

While doubleFunction's body is empty, it takes its argument by value,
which means copying. Copying an uninitialized double is a gray zone
(if you follow the partially-formed paradigma, it's UB; though the std
may allow it some types, most notably std::byte and uchar; probably
not double, though). Converting an uninitialized int into double is
most certainly UB.

Fix by initializing both d and i.

Found by GCC 11's -Wmaybe-uninitialized.

Pick-to: 6.5 6.2 5.15
Change-Id: I103fb72bf4b8792a292346007f498dc6349e9c68
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

0 files changed, 0 insertions, 0 deletions