(svn r2514) - Codechange: [NPF] Move the checking of railtype into a funciton IsCompatibleRail().

- Codechange: [NPF] Check the railtype along a route against the engine type instead of against the previouse tile. This clears the way for electriefied rails.
- Add: [NPF] [ 1209644 ] A penalty for crossings (peter1138)

variables.h

@@ -216,6 +216,7 @@ typedef struct Patches {
 	uint32 npf_buoy_penalty; /* The penalty for going over (through) a buoy */
 	uint32 npf_water_curve_penalty; /* The penalty for curves */
 	uint32 npf_road_curve_penalty; /* The penalty for curves */
+ 	uint32 npf_crossing_penalty; /* The penalty for level crossings */
 
 	bool population_in_label; // Show the population of a town in his label?
 } Patches;