FIX: Crash when starting paksets with no demo.sve
FIX: Trains did not stop in the correct position on platforms.
Merge branch '112.x-merge' of git://github.com/BerndGabriel/simutrans-experimental.git into 112.x-merge

Conflicts:
	simcity.cc
Some more INT_CHECK excluded from low level methods
Merge branch '112.x-merge' of git://github.com/jamespetts/simutrans-experimental.git into 112.x-merge
Fixed: avoid station too short message, if max_len >= 8888.