WMS server: parse bounding box only if the BBOX parameter is really there

Author: mhugent

src/server/qgswmsserver.cpp

@@ -2073,8 +2073,13 @@ int QgsWMSServer::configureMapRender( const QPaintDevice* paintDevice ) const
   mMapRenderer->setOutputSize( QSize( paintDevice->width(), paintDevice->height() ), paintDevice->logicalDpiX() );
 
   //map extent
-  bool bboxOk;
-  QgsRectangle mapExtent = _parseBBOX( mParameters.value( "BBOX", "0,0,0,0" ), bboxOk );
+  bool bboxOk = true;
+  QgsRectangle mapExtent;
+  if( mParameters.contains( "BBOX" ) )
+  {
+    mapExtent = _parseBBOX( mParameters.value( "BBOX", "0,0,0,0" ), bboxOk );
+  }
+
   if ( !bboxOk )
   {
     //throw a service exception