[graphics/krita] libs/ui: Fix Qt6 build

Git commit a4d196efa7fc1ead25d5c560113d88a63569327b by Freya Lupen.
Committed on 26/07/2026 at 13:03.
Pushed by freyalupen into branch 'master'.

Fix Qt6 build

and switching to System theme when switching style to macOS.

M  +1    -1    libs/ui/KisMainWindow.cpp

https://invent.kde.org/graphics/krita/-/commit/a4d196efa7fc1ead25d5c560113d88a63569327b

diff --git a/libs/ui/KisMainWindow.cpp b/libs/ui/KisMainWindow.cpp
index 0a86bdca4c8..bbf49728f3e 100644
--- a/libs/ui/KisMainWindow.cpp
+++ b/libs/ui/KisMainWindow.cpp
@@ -2562,7 +2562,7 @@ void KisMainWindow::slotUpdateWidgetStyle()
                 d->themeManager->setCurrentTheme("System");
             }
 #else
-            if (currentStyle || currentStyle == "windowsvista") {
+            if (currentStyle == "macos" || currentStyle == "windowsvista") {
                 d->themeManager->setCurrentTheme("System");
             }
 #endif