Compilers _do_ grumble, after all:
qlocale_tools_p.h:68:14: warning: comparing floating point with == or != is unsafe [-Wfloat-equal]
return d == 0; // Amusingly, compilers do not grumble.
~ ^ ~
Fix by using the public qIsNull(double) function, which has
suppressions and was designed for this task.
Amends f645bb8880.
Pick-to: 6.7 6.5
Task-number: QTBUG-126219
Change-Id: I33f1fcb4c8c2ee30ad9a36cb46b806ef253e8062
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
(cherry picked from commit aac83724013a1f226d2bf4b923447eb1b0e5c493)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
d96ce5eb0d