Add: [NewGRF] vehicle variable 63 to test the tracktype of the current tile against a given tracktype.

src/table/newgrf_debug_data.h

@@ -63,7 +63,8 @@ static const NIVariable _niv_vehicles[] = {
 	NIV(0x4D, "position in articulated vehicle"),
 	NIV(0x60, "count vehicle id occurrences"),
 	// 0x61 not useful, since it requires register 0x10F
-	NIV(0x62, "Curvature/position difference to other vehicle"),
+	NIV(0x62, "curvature/position difference to other vehicle"),
+	NIV(0x63, "tile compatibility wrt. track-type"),
 	NIV_END()
 };