(svn r3717) - [2cc] Add 2cc colour maps and use for newgrf engines requiring them. Currently the second colour is fixed to be the player's colour.

engine.h

@@ -98,6 +98,15 @@ typedef struct Engine {
 	byte type;				// type, ie VEH_Road, VEH_Train, etc. Same as in vehicle.h
 } Engine;
 
+/**
+ * EngineInfo.misc_flags is a bitmask, with the following values
+ */
+enum {
+	EF_RAIL_TILTS = 0, ///< Rail vehicle tilts in curves (unsupported)
+	EF_ROAD_TRAM  = 0, ///< Road vehicle is a tram/light rail vehicle (unsup)
+	EF_USES_2CC   = 1, ///< Vehicle uses two company colours
+	EF_RAIL_IS_MU = 2, ///< Rail vehicle is a multiple-unit (DMU/EMU)
+};
 
 enum {
 	RVI_MULTIHEAD = 1,