change QRegion to QList for dbus plasma call

--change how dbus arguments are sent to Plasma
and a QList arguments for this

BUG:418559

app/plasma/extended/screengeometries.cpp

@@ -124,13 +124,29 @@ void ScreenGeometries::updateGeometries()
 
             if (!m_lastAvailableRect.contains(scrName) || m_lastAvailableRect[scrName] != availableRect) {
                 m_lastAvailableRect[scrName] = availableRect;
-                plasmaStrutsIface.call("setAvailableScreenRect", LATTESERVICE, scrName, availableRect);
+
+                QList<QVariant> args;
+                args << LATTESERVICE;
+                args << scrName;
+                args << availableRect;
+
+                plasmaStrutsIface.callWithArgumentList(QDBus::NoBlock, "setAvailableScreenRect", args);
                 qDebug() << " PLASMA SCREEN GEOMETRIES AVAILABLE RECT :: " << screen->name() << " : " << availableRect;
             }
 
             if (!m_lastAvailableRegion.contains(scrName) || m_lastAvailableRegion[scrName] != availableRegion) {
                 m_lastAvailableRegion[scrName] = availableRegion;
-                plasmaStrutsIface.call("setAvailableScreenRegion", LATTESERVICE, scrName, availableRegion);
+
+                QList<QVariant> args;
+                args << LATTESERVICE;
+                args << scrName;
+
+                //! transform QRegion to QList<QRect> in order to send through dbus
+                for(QRect subrect : availableRegion) {
+                    args << subrect;
+                }
+
+                plasmaStrutsIface.callWithArgumentList(QDBus::NoBlock, "setAvailableScreenRegion", args);
                 qDebug() << " PLASMA SCREEN GEOMETRIES AVAILABLE REGION :: " << screen->name() << " : " << availableRegion;
             }
         }