cemu-ti: Fix build failure (#349005)

  sourceRoot = "${finalAttrs.src.name}/gui/qt/";

  patches = [

    # This is resolved upstream, but I can't apply the patch because the

    # sourceRoot isn't set to the base of the Git repo.

    ./resolve-ambiguous-constexpr.patch

  ];

  nativeBuildInputs = [

    cmake

diff --git a/mainwindow.cpp b/mainwindow.cpp

index f03a743e..70c29a45 100644

--- a/mainwindow.cpp

+++ b/mainwindow.cpp

@@ -970,7 +970,7 @@ void MainWindow::showEvent(QShowEvent *e) {

 DockWidget *MainWindow::redistributeFindDock(const QPoint &pos) {

     QWidget *child = childAt(pos);

     if (QTabBar *tabBar = findSelfOrParent<QTabBar *>(child)) {

-        child = childAt({pos.x(), tabBar->mapTo(this, QPoint{}).y() - 1});

+        child = childAt(QPoint({pos.x(), tabBar->mapTo(this, QPoint{}).y() - 1}));

     }

     return findSelfOrParent<DockWidget *>(child);

 }