Fix build with -no-feature-toolbutton

Change-Id: Id583165602e84ea0fae972c377ced30e4a4d96cb
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 3932417dc9b81c7ffcf9f4156c7645d04f8f4971)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/widgets/widgets/qlineedit_p.cpp

@@ -646,7 +646,7 @@ static int effectiveTextMargin(int defaultMargin, const QLineEditPrivate::SideWi
 
     const auto visibleSideWidgetCount = std::count_if(widgets.begin(), widgets.end(),
                              [](const QLineEditPrivate::SideWidgetEntry &e) {
-#if QT_CONFIG(animation)
+#if QT_CONFIG(toolbutton)
         // a button that's fading out doesn't get any space
         if (auto* iconButton = qobject_cast<QLineEditIconButton*>(e.widget))
             return iconButton->needsSpace();