Set Qt::AA_UseHighDpiPixmaps before app instance creation

NO_CHANGELOG

main.cpp

@@ -50,6 +50,8 @@
  */
 int main(int argc, char* argv[])
 {
+    QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps, true);
+
     QApplication app(argc, argv);
     KLocalizedString::setApplicationDomain("kompare");
 
@@ -69,8 +71,6 @@ int main(int argc, char* argv[])
     KAboutData::setApplicationData(aboutData);
     app.setWindowIcon(QIcon::fromTheme(QStringLiteral("kompare"), app.windowIcon()));
 
-    app.setAttribute(Qt::AA_UseHighDpiPixmaps, true);
-
     QCommandLineParser parser;
     aboutData.setupCommandLine(&parser);
     parser.addOption(QCommandLineOption(QStringLiteral("c"), i18n("This will compare URL1 with URL2")));