a little more deterministic behaviour: Svg::elementSize(elementId)

returns 0,0 for not existing elements: this fixes also some of the panel
funny behaviour

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=803651

svg.cpp

@@ -219,6 +219,11 @@ class Svg::Private
         QSize elementSize(const QString& elementId)
         {
             createRenderer();
+
+            if (!renderer->elementExists(elementId)) {
+                return QSize(0, 0);
+            }
+
             QSizeF elementSize = renderer->boundsOnElement(elementId).size();
             QSizeF naturalSize = renderer->defaultSize();
             qreal dx = size.width() / naturalSize.width();