(svn r2756) Renamed railtypes into _railtypes

Renamed railtypes.c into railtypes.h, all other tables are in .h files. (It should be in the tables dir but I couldn't figure out how to get it there without deleting it first).
Added const and extern.

Makefile

@@ -670,7 +670,6 @@ C_SOURCES += queue.c
 C_SOURCES += rail.c
 C_SOURCES += rail_cmd.c
 C_SOURCES += rail_gui.c
-C_SOURCES += railtypes.c
 C_SOURCES += rev.c
 C_SOURCES += road_cmd.c
 C_SOURCES += road_gui.c

rail.h

@@ -161,7 +161,7 @@ typedef struct RailtypeInfo {
 	byte compatible_railtypes;
 } RailtypeInfo;
 
-RailtypeInfo railtypes[RAILTYPE_END];
+extern const RailtypeInfo _railtypes[RAILTYPE_END];
 
 // these are the maximums used for updating signal blocks, and checking if a depot is in a pbs block
 enum {
@@ -528,10 +528,10 @@ static inline TransportType GetCrossingTransportType(TileIndex tile, Track track
  * @param railtype the rail type which the information is requested for
  * @return The pointer to the RailtypeInfo
  */
-static inline RailtypeInfo *GetRailTypeInfo(RailType railtype)
+static inline const RailtypeInfo *GetRailTypeInfo(RailType railtype)
 {
 	assert(railtype < RAILTYPE_END);
-	return &railtypes[railtype];
+	return &_railtypes[railtype];
 }
 
 /**

rail_cmd.c

@@ -22,6 +22,7 @@
 #include "waypoint.h"
 #include "npf.h"
 #include "rail.h"
+#include "railtypes.h" // include table for railtypes
 
 extern uint16 _custom_sprites_base;
 

railtypes.h

@@ -1,17 +1,12 @@
 /* $Id: */
 
-#include "stdafx.h"
-#include "openttd.h"
-#include "rail.h"
-#include "table/sprites.h"
-
-/** @file railtypes.c
+/** @file railtypes.h
  * All the railtype-specific information is stored here.
  */
 
 /** Global Railtype definition
  */
-RailtypeInfo railtypes[RAILTYPE_END] = {
+const RailtypeInfo _railtypes[RAILTYPE_END] = {
 	{
 		{
 			SPR_RAIL_TRACK_Y,