BuildVRT: set input layer list when tool starting (follow d6ea1a0).

Thanks Etienne for the patch.

Author: brushtyler

python/plugins/GdalTools/tools/doBuildVRT.py

@@ -47,6 +47,7 @@ def __init__(self, iface):
   def initialize(self):
       # connect to mapCanvas.layerChanged() signal
       self.connect(self.iface.mapCanvas(), SIGNAL("layersChanged()"), self.onVisibleLayersChanged)
+      self.onVisibleLayersChanged()
       BasePluginWidget.initialize(self)
 
   def onClosing(self):