Merge branch 'improved_breakdowns' into jgrpp

# Conflicts:
#	src/saveload/extended_ver_sl.cpp
#	src/train_cmd.cpp

src/vehicle_type.h

@@ -88,6 +88,7 @@ enum BreakdownType {
 	BREAKDOWN_EM_STOP   = 1, ///< Emergency stop
 	BREAKDOWN_LOW_SPEED = 2, ///< Lower max speed
 	BREAKDOWN_LOW_POWER = 3, ///< Power reduction
+	BREAKDOWN_RV_CRASH  = 4, ///< Train hit road vehicle
 
 	BREAKDOWN_AIRCRAFT_SPEED      = BREAKDOWN_CRITICAL,  ///< Lower speed until the next airport
 	BREAKDOWN_AIRCRAFT_DEPOT      = BREAKDOWN_EM_STOP,   ///< We have to visit a depot at the next airport