fix layout of layer selection in grass toolbox

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@10335 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/plugins/grass/qgsgrassmodule.cpp

@@ -2628,7 +2628,11 @@ QgsGrassModuleGdalInput::QgsGrassModuleGdalInput(
     }
   }
 
-  mLayerComboBox = new QComboBox( this );
+  QHBoxLayout *l = new QHBoxLayout( this );
+  mLayerComboBox = new QComboBox();
+  mLayerComboBox->setSizePolicy( QSizePolicy::Expanding,
+                                 QSizePolicy:: Preferred );
+  l->addWidget( mLayerComboBox );
 
   // Of course, activated(int) is not enough, but there is no signal
   // BEFORE the cobo is opened