[PATCH] qconf: fix SIGSEGV on empty menu items

[Cyrill V. Gorcunov]

qconf may cause SIGSEGV by trying to show debug
information on empty menu items

Signed-off-by: Cyrill V. Gorcunov <gorcunov@xxxxxxxxx>
---
diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 0b2fcc4..0694d1d 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -925,6 +925,8 @@ ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
                configSettings->endGroup();
                connect(configApp, SIGNAL(aboutToQuit()), SLOT(saveSettings()));
        }
+
+       has_dbg_info = 0;
 }
 
 void ConfigInfoView::saveSettings(void)
@@ -953,10 +955,13 @@ void ConfigInfoView::setInfo(struct menu *m)
        if (menu == m)
                return;
        menu = m;
-       if (!menu)
+       if (!menu) {
+               has_dbg_info = 0;
                clear();
-       else
+       } else {
+               has_dbg_info = 1;
                menuInfo();
+       }
 }
 
 void ConfigInfoView::setSource(const QString& name)
@@ -991,6 +996,9 @@ void ConfigInfoView::symbolInfo(void)
 {
        QString str;
 
+       if (!has_dbg_info)
+               return;
+
        str += "<big>Symbol: <b>";
        str += print_filter(sym->name);
        str += "</b></big><br><br>value: ";
diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
index 6fc1c5f..a397edb 100644
--- a/scripts/kconfig/qconf.h
+++ b/scripts/kconfig/qconf.h
@@ -273,6 +273,8 @@ protected:
        struct symbol *sym;
        struct menu *menu;
        bool _showDebug;
+
+       int has_dbg_info;
 };
 
 class ConfigSearchWindow : public QDialog {
-
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