Update for bug 1180482 : crash in check for missed station after uncoupling.
Update for bugs 1132252 and 1180978 : crash when processing invalid path.
Update for bug 1090500 : incorrect speed limit after passing signal.
Update for bug 1168261 : further improvements in processing of waiting points for AI trains.
(With thanks to Carlo Santucci and Stefan Paitoni for their help)
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@1609 a9f3cfff-6c41-7446-b0ca-052bd761e6eb