Processing of sigcfg.dat file : when duplicate names are used for SignalDrawStates, the double entry is no longer rejected but this state is inserted using a dummy name, allowing it to be referenced in the signal script through the number.
git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@1658 a9f3cfff-6c41-7446-b0ca-052bd761e6eb