kconfig: qconf: clean deprecated warnings

The recommended way to initialize a null string is with
QString(). This is there at least since Qt5.5, with is
when qconf was ported to Qt5.

Fix those warnings:

	scripts/kconfig/qconf.cc: In member function ‘void ConfigItem::updateMenu()’:
	scripts/kconfig/qconf.cc:158:31: warning: ‘QString::null’ is deprecated: use QString() [-Wdeprecated-declarations]
	  158 |    setText(noColIdx, QString::null);
	      |                               ^~~~
	In file included from /usr/include/qt5/QtCore/qobject.h:47,
	                 from /usr/include/qt5/QtWidgets/qwidget.h:45,
	                 from /usr/include/qt5/QtWidgets/qmainwindow.h:44,
	                 from /usr/include/qt5/QtWidgets/QMainWindow:1,
	                 from scripts/kconfig/qconf.cc:9:

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 50a5245..3ea255a 100644 (file)
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -154,9 +154,9 @@ void ConfigItem::updateMenu(void)
 
                if (!sym_is_changeable(sym) && list->optMode == normalOpt) {
                        setPixmap(promptColIdx, QIcon());
-                       setText(noColIdx, QString::null);
-                       setText(modColIdx, QString::null);
-                       setText(yesColIdx, QString::null);
+                       setText(noColIdx, QString());
+                       setText(modColIdx, QString());
+                       setText(yesColIdx, QString());
                        break;
                }
                expr = sym_get_tristate_value(sym);
@@ -276,7 +276,7 @@ void ConfigLineEdit::show(ConfigItem* i)
        if (sym_get_string_value(item->menu->sym))
                setText(QString::fromLocal8Bit(sym_get_string_value(item->menu->sym)));
        else
-               setText(QString::null);
+               setText(QString());
        Parent::show();
        setFocus();
 }