[plugins/qpa] Properly ifdef everything with HAVE_WAYLAND_EGL

Hide variables which are only used with wayland egl and mark attributes
as unused if they are not used without having wayland egl.

plugins/qpa/window.cpp

@@ -130,6 +130,9 @@ void Window::createEglSurface(EGLDisplay dpy, EGLConfig config)
         return;
     }
     m_eglSurface = eglCreateWindowSurface(dpy, config, m_eglWaylandWindow, nullptr);
+#else
+    Q_UNUSED(dpy)
+    Q_UNUSED(config)
 #endif
 }
 

plugins/qpa/window.h

@@ -31,7 +31,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 class QOpenGLFramebufferObject;
 
+#if HAVE_WAYLAND_EGL
 struct wl_egl_window;
+#endif
 
 namespace KWayland
 {
@@ -87,7 +89,9 @@ private:
     QSharedPointer<QOpenGLFramebufferObject> m_contentFBO;
     bool m_resized = false;
     ShellClient *m_shellClient = nullptr;
+#if HAVE_WAYLAND_EGL
     wl_egl_window *m_eglWaylandWindow = nullptr;
+#endif
     quint32 m_windowId;
     const Integration *m_integration;
 };