Qt: Fencepost error in minimap/intelligent scrollbar

The location of the next line should be based off one row larger
than the current row.

This fixes an issue where all the lines drawn in the intelligent
scrollbar are off by one - the color intended to be drawn for
the first packet never appears, the first packet corresponds to
the line for the second packet, etc., and there is a line at
the bottom that can never be colored in.

Fix #18850

1 files changed, 1 insertions, 1 deletions

diff --git a/ui/qt/packet_list.cpp b/ui/qt/packet_list.cpp
index 361d180d07..40ab5ab3db 100644
--- a/ui/qt/packet_list.cpp
+++ b/ui/qt/packet_list.cpp
@@ -2052,7 +2052,7 @@ void PacketList::drawNearOverlay()
                 bgcolor = &color_filter->bg_color;
             }
 
-            int next_line = (row - start) * o_height / o_rows;
+            int next_line = (row - start + 1) * o_height / o_rows;
             if (bgcolor) {
                 QColor color(ColorUtils::fromColorT(bgcolor));
                 painter.fillRect(0, cur_line, o_width, next_line - cur_line, color);