Cope if mktime() deems times in a spring forward gap to be invalid

In tst_QDateTime::springForward(), we test correct handling of times
in the gap; these are formally invalid and a mktime() implementation
may reasonably reject them causing our date-time code to produce an
invalid result.  So handle that case gracefully in the tests, only
insisting on consistency between the two ways of preparing the date.
In one test, package the repeated code I was going to adapt into a
macro to save repeitition.

Task-number: QTBUG-68832
Task-number: QTBUG-68839
Change-Id: Ib8a16ff007f4e75ab2ccff05b1ccf00a45e50dc8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

0 files changed, 0 insertions, 0 deletions