Merge branch 'master' into jgrpp

# Conflicts:
#	src/core/bitmath_func.cpp
#	src/core/bitmath_func.hpp
#	src/core/geometry_type.hpp
#	src/game/game_text.hpp
#	src/graph_gui.cpp
#	src/pathfinder/npf/npf.cpp
#	src/script/api/script_text.cpp
#	src/spritecache.cpp
#	src/track_func.h

src/road_type.h

@@ -52,7 +52,7 @@ DECLARE_ENUM_AS_BIT_SET(RoadTypes)
  * This enumeration defines the possible road parts which
  * can be build on a tile.
  */
-enum RoadBits {
+enum RoadBits : uint8_t {
 	ROAD_NONE = 0U,                  ///< No road-part is build
 	ROAD_NW   = 1U,                  ///< North-west part
 	ROAD_SW   = 2U,                  ///< South-west part