In my pdf gantt chart, some task bars which have small progress percentage are painted with wrong length.
They must have short green rectangle, but the results is long green rectangle.

In lib/redmine/helpers/gantt.rb, the green rectangle is painted here:

if coords[:bar_progress_end]
  params[:pdf].SetY(params[:top] + 1.5)
  params[:pdf].SetX(params[:subject_width] + coords[:bar_start])
  params[:pdf].SetFillColor(90, 200, 90)
  params[:pdf].RDMCell(coords[:bar_progress_end] - coords[:bar_start], height, "", 0, 0, "", 1)
end

If a task have small progress, @coords[:bar_progress_end]@ and @coords[:bar_start]@ may have the same value because they are rounded by this code.

# Transforms dates into pixels witdh
coords.keys.each do |key|
  coords[key] = (coords[key] * zoom).floor
end

If @coords[:bar_progress_end] - coords[:bar_start]@ was zero, RDMCell() paints long rectangle stretched to the most right side.

Environment:
Redmine version 2.5.2.stable
Ruby version 1.9.3-p484 (2013-11-22) [x86_64-linux]
Rails version 3.2.19
Environment production
Database adapter Mysql2