package/qt5wayland: fix compilation when libxkbcommon is disabled

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>
(cherry picked from commit 1da911cbde3d744ff70211cf3ea714f55888adc5)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/qt5/qt5wayland/0001-Add-missing-define-guards.patch

@@ -0,0 +1,35 @@
+From 05658e127dedfff65789860415537c6920ec574d Mon Sep 17 00:00:00 2001
+From: Samuli Piippo <samuli.piippo@qt.io>
+Date: Thu, 22 Apr 2021 15:29:56 +0300
+Subject: [PATCH] Add missing define guards
+
+Ammend cca1b94190a094b5d1d7ce492b6533e2d330c5e8 to use m_composeState
+only if xcbcommon is available.
+
+Pick-to: 5.15
+Change-Id: I48332b15def3282c5bda3e1c7c393ea7e9849cbe
+Reviewed-by: Aleix Pol Gonzalez <aleixpol@kde.org>
+[Backported from: 05658e127dedfff65789860415537c6920ec574d]
+Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
+---
+ src/client/qwaylandinputcontext.cpp | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/client/qwaylandinputcontext.cpp b/src/client/qwaylandinputcontext.cpp
+index 16e03ea1..cbf63cde 100644
+--- a/src/client/qwaylandinputcontext.cpp
++++ b/src/client/qwaylandinputcontext.cpp
+@@ -408,8 +408,10 @@ bool QWaylandInputContext::isValid() const
+ void QWaylandInputContext::reset()
+ {
+     qCDebug(qLcQpaInputMethods) << Q_FUNC_INFO;
++#if QT_CONFIG(xkbcommon)
+     if (m_composeState)
+         xkb_compose_state_reset(m_composeState);
++#endif
+ 
+     QPlatformInputContext::reset();
+ 
+-- 
+2.35.1
+