When libxkbcommon is disabled, QT_CONFIG(xkbcommon) is not defined which
means the variable and function pointer in this patch are compiled out
from the header, but the cpp code actually still made use of it. This
patch fixes the build issue when libxkbcommon package is not to be
built.
This patch was taken from (merged):
https://codereview.qt-project.org/c/qt/qtwayland/+/344916
Cc: Quentin Schulz <foss+buildroot@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
1da911cbde