Fix some minor rendering glitches (off by one errors)

qrenderdoc/Widgets/Extended/RDHeaderView.cpp

@@ -802,7 +802,6 @@ void RDHeaderView::paintEvent(QPaintEvent *e)
     if(hasGroupTitle(i))
     {
       painter.save();
-      accumRect.setWidth(accumRect.width() - 1);
 
       if(accumRect.left() < m_pinnedWidth && i >= m_pinnedColumns)
         accumRect.setLeft(m_pinnedWidth);

qrenderdoc/Widgets/Extended/RDTreeView.cpp

@@ -232,10 +232,12 @@ void RDTreeView::drawRow(QPainter *painter, const QStyleOptionViewItem &options,
                                           back.greenF() * 0.8 + fore.greenF() * 0.2,
                                           back.blueF() * 0.8 + fore.blueF() * 0.2)));
 
+    QRect intersectrect = options.rect.adjusted(0, 0, 1, 0);
+
     for(int i = 0, count = model()->columnCount(); i < count; i++)
     {
       QRect r = visualRect(model()->index(index.row(), i, index.parent()));
-      r = r.intersected(options.rect);
+      r = r.intersected(intersectrect);
 
       // draw bottom and right of the rect
       if(r.width() > 0 && r.height() > 0)