Refine QTZP_win's msecsToDate() by trusting arithmetic

Division and modulo are guaranteed to be consistent, with the former
truncating towards zero, so the latter giving a remainder that either
is zero or has the same sign as the numerator. In particular, when the
numerator is positive, the remainder is necessarily greater than minus
it, so the formerly correct but unilluminating arithmetic necessarily
gave the answer one and we can just --jd rather than doing anything
cleverer. Assert the fact that ensures this.

Change-Id: Ia718bb947192f1fd2eb36549be12d30e4ee03d58
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
(cherry picked from commit 9135531c33551e03ef2b7287830228def0a81f5a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

0 files changed, 0 insertions, 0 deletions