Add notify signal for Svg::imagePath property

The missing notify signal was causing problems in QtQuick2:
"depends on non-NOTIFYable properties".

Reviewed-By: Marco Martin

src/plasma/svg.cpp

@@ -235,6 +235,8 @@ bool SvgPrivate::setImagePath(const QString &imagePath)
         lastModified = info.lastModified().toTime_t();
     }
 
+    emit q->imagePathChanged();
+
     return updateNeeded;
 }
 

src/plasma/svg.h

@@ -59,7 +59,7 @@ class PLASMA_EXPORT Svg : public QObject
     Q_ENUMS(ContentType)
     Q_PROPERTY(QSize size READ size WRITE resize NOTIFY sizeChanged)
     Q_PROPERTY(bool multipleImages READ containsMultipleImages WRITE setContainsMultipleImages)
-    Q_PROPERTY(QString imagePath READ imagePath WRITE setImagePath)
+    Q_PROPERTY(QString imagePath READ imagePath WRITE setImagePath NOTIFY imagePathChanged)
     Q_PROPERTY(bool usingRenderingCache READ isUsingRenderingCache WRITE setUsingRenderingCache)
 
     public:
@@ -378,6 +378,11 @@ class PLASMA_EXPORT Svg : public QObject
          */
         void sizeChanged();
 
+        /**
+         * Emitted whenever the image path of the Svg is changed.
+         */
+        void imagePathChanged();
+
     private:
         SvgPrivate *const d;