added code to clear background where there is no pdf content to be shown

right now it's in black ... this should probably be changed to something more reasonable
from the color scheme

svn path=/trunk/kdegraphics/kpdf/; revision=275315

kpdf/kpdf_pagewidget.cc

@@ -106,9 +106,15 @@ namespace KPDF
         if (m_outputdev)
             m_pixmap = m_outputdev->getPixmap();
         if ( m_pixmap != NULL && ! m_pixmap->isNull() )
+				{
             p->drawPixmap ( clipx, clipy, *m_pixmap, clipx, clipy, clipw, cliph );
+            if (clipw > m_pixmap->width()) 
+							p->fillRect ( m_pixmap->width(), clipy, clipw, cliph, black );
+						if (cliph > m_pixmap->height())
+							p->fillRect ( clipx, m_pixmap->height() - clipy, clipw, cliph, black );
+				}
         else
-            p->fillRect ( clipx, clipy, clipw, cliph, white );
+            p->fillRect ( clipx, clipy, clipw, cliph, black );
     }
 
     void PageWidget::nextPage()