Fix build with -no-feature-textedit

qtbase/src/widgets/styles/qstylesheetstyle.cpp: In function ‘quint64 extendedPseudoClass(const QWidget*)’:
qtbase/src/widgets/styles/qstylesheetstyle.cpp:2577:1: warning: control reaches end of non-void function [-Wreturn-type]
 2577 | }

Change-Id: Id53d637d43a8d530a7bdfbd7d5b823162d1399b5
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 29e739f93852dcf3d431bd944b3ec7ac5c7bf3fc)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/widgets/styles/qstylesheetstyle.cpp

@@ -2571,8 +2571,9 @@ static quint64 extendedPseudoClass(const QWidget *w)
     } else
     if (const QPlainTextEdit *edit = qobject_cast<const QPlainTextEdit *>(w)) {
         pc |= (edit->isReadOnly() ? PseudoClass_ReadOnly : PseudoClass_Editable);
-    }
+    } else
 #endif
+    {}
     return pc;
 }