Fix focus rectangle drawing on external paint device

src/kernel/qpainter_x11.cpp

@@ -1860,8 +1860,8 @@ void QPainter::drawWinFocusRect( int x, int y, int w, int h,
             QPDevCmdParam param[1];
             QRect r( x, y, w-1, h-1 );
             QBrush noBrush;
+            setBrush( noBrush );
             param[0].rect = &r;
-            param[0].brush = &noBrush;
             if ( !pdev->cmd( QPaintDevice::PdcDrawRect, this, param ) || !hd) {
                 setRasterOp( old_rop );
                 setPen( old_pen );