Fix compiler warnings in Qt Designer.

shared/widgetdatabase.cpp:371:66: warning: typedef 'NameItemMap' locally defined but not used [-Wunused-local-typedefs]
tools/designer/src/lib/shared/previewmanager.cpp:820:16: warning: converting ‘false’ to pointer type ‘QWidget*’ [-Wconversion-null]

Task-number: QTBUG-44747
Change-Id: I9781a8cbce1def5229fe0ed7071c04ae6880b039
Reviewed-by: Oliver Wolff <[email protected]>

Author: Friedemann Kleint

tools/designer/src/lib/shared/previewmanager.cpp

@@ -817,7 +817,7 @@ QWidget *PreviewManager::raise(const QDesignerFormWindowInterface *fw, const Pre
 {
     typedef PreviewManagerPrivate::PreviewDataList PreviewDataList;
     if (d->m_previews.empty())
-        return false;
+        return 0;
 
     // find matching window
     const PreviewDataList::const_iterator cend =  d->m_previews.constEnd();

tools/designer/src/lib/shared/widgetdatabase.cpp

@@ -368,7 +368,6 @@ void WidgetDataBase::loadPlugins()
 {
     typedef QMap<QString, int> NameIndexMap;
     typedef QList<QDesignerWidgetDataBaseItemInterface*> ItemList;
-    typedef QMap<QString, QDesignerWidgetDataBaseItemInterface*> NameItemMap;
     typedef QSet<QString> NameSet;
     // 1) create a map of existing custom classes
     NameIndexMap existingCustomClasses;