Merge branch 'master' into jgrpp

# Conflicts:
#	src/3rdparty/squirrel/include/squirrel.h
#	src/blitter/32bpp_sse_func.hpp
#	src/bridge_map.h
#	src/clear_map.h
#	src/company_manager_face.h
#	src/console_func.h
#	src/core/bitmath_func.hpp
#	src/core/endian_func.hpp
#	src/core/random_func.hpp
#	src/depot_map.h
#	src/elrail_func.h
#	src/fontcache.h
#	src/industry_map.h
#	src/map_func.h
#	src/newgrf_spritegroup.h
#	src/object_map.h
#	src/rail.h
#	src/rail_map.h
#	src/road_func.h
#	src/road_map.h
#	src/saveload/saveload.h
#	src/saveload/saveload_error.hpp
#	src/settings_gui.cpp
#	src/sl/oldloader.h
#	src/sprite.h
#	src/spritecache.h
#	src/station_func.h
#	src/station_map.h
#	src/story_base.h
#	src/strings_func.h
#	src/tile_cmd.h
#	src/tile_map.h
#	src/tile_type.h
#	src/town.h
#	src/town_map.h
#	src/tree_map.h
#	src/tunnel_map.h
#	src/tunnelbridge_map.h
#	src/vehicle_func.h
#	src/viewport_func.h
#	src/void_map.h
#	src/water.h
#	src/water_map.h
#	src/widget_type.h

src/programmable_signals.h

@@ -413,7 +413,7 @@ typedef std::map<SignalReference, SignalProgram*> ProgramList;
 extern ProgramList _signal_programs;
 
 /// Verifies that a SignalReference refers to a signal which has a program.
-static inline bool HasProgrammableSignals(SignalReference ref)
+inline bool HasProgrammableSignals(SignalReference ref)
 {
 	return IsTileType(ref.tile, MP_RAILWAY) && GetRailTileType(ref.tile) == RAIL_TILE_SIGNALS
 	    && IsPresignalProgrammable(ref.tile, ref.track);