Corrects a problem in location-related deadlock processing which can cause a crash.
Corrects a problem when two signals are so close together that AI trains are waiting for the second signal before passing the first signal (bug 1266067).
Corrects a problem which sometimes caused the player train to go 'off path' when coupling.
Removed unnecessary name-space references from sigscrfile.cs.
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@2046 a9f3cfff-6c41-7446-b0ca-052bd761e6eb