fix some warnings

Author: jef-n

src/mapserver/qgsmslayerbuilder.cpp

@@ -93,7 +93,6 @@ void QgsMSLayerBuilder::clearRasterSymbology( QgsRasterLayer* rl ) const
     if ( rl->rasterType() == QgsRasterLayer::GrayOrUndefined )
     {
       rl->setDrawingStyle( QgsRasterLayer::SingleBandPseudoColor );
-      rl->setRasterShaderFunction( new QgsRasterShaderFunction() );
     }
   }
 }

src/mapserver/qgssldparser.cpp

@@ -1486,7 +1486,6 @@ void QgsSLDParser::clearRasterSymbology( QgsRasterLayer* rl ) const
     if ( rl->rasterType() == QgsRasterLayer::GrayOrUndefined )
     {
       rl->setDrawingStyle( QgsRasterLayer::SingleBandPseudoColor );
-      rl->setRasterShaderFunction( new QgsRasterShaderFunction() );
     }
   }
 }

src/providers/ows/qgsowsdataitems.cpp

@@ -237,6 +237,7 @@ QGISEXTERN QgsDataItem * dataItem( QString thePath, QgsDataItem* parentItem )
 QGISEXTERN QDialog * selectWidget( QWidget * parent, Qt::WFlags fl )
 {
   Q_UNUSED( parent );
+  Q_UNUSED( fl );
   //return new QgsOWSSourceSelect( parent, fl );
   return 0;
 }