Hotfix 294

Hi All

Thanks for you help with my request yesterday for information on the train graphical glitch a few of you have reported. On discord we tracked the cause down to two trains occasionally being called by a signal automater. Only one would then depart, leaving behind an empty train husk.

Hotfix 294
-prevents 2 trains being called at once if you call train (or if an emergency delayed train is called) at the same time (or just prior to while paused), as the signal automater calls one