make consistent with Applet API

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=842643

wallpaper.cpp

@@ -183,7 +183,7 @@ void Wallpaper::init(const QString &action)
     Q_UNUSED(action);
 }
 
-QWidget *Wallpaper::configuration(QWidget *parent)
+QWidget *Wallpaper::createConfigurationInterface(QWidget *parent)
 {
     Q_UNUSED(parent);
     return 0;

wallpaper.h

@@ -150,7 +150,7 @@ class PLASMA_EXPORT Wallpaper : public QObject
         /**
          * Returns widget for configuration dialog.
          */
-        virtual QWidget *configuration(QWidget *parent);
+        virtual QWidget *createConfigurationInterface(QWidget *parent);
 
     Q_SIGNALS:
         /**