Merge branch 'master' into jgrpp

# Conflicts:
#	src/cheat_gui.cpp
#	src/command.cpp
#	src/command_func.h
#	src/company_base.h
#	src/debug.cpp
#	src/debug.h
#	src/economy.cpp
#	src/engine_type.h
#	src/graph_gui.cpp
#	src/misc_cmd.cpp
#	src/misc_cmd.h
#	src/network/core/os_abstraction.cpp
#	src/openttd.cpp
#	src/saveload/saveload.cpp
#	src/saveload/saveload.h
#	src/settings_type.h
#	src/ship_cmd.cpp
#	src/stdafx.h
#	src/tests/bitmath_func.cpp
#	src/town_cmd.cpp
#	src/town_gui.cpp

src/debug_fmt.h

@@ -21,7 +21,7 @@
  * @param level The maximum debug level this message should be shown at. When the debug level for this category is set lower, then the message will not be shown.
  * @param format_string The formatting string of the message.
  */
-#define Debug(name, level, format_string, ...) if ((level) == 0 || _debug_ ## name ## _level >= (level)) debug_print(#name, fmt::format(FMT_STRING(format_string), ## __VA_ARGS__).c_str())
+#define Debug(name, level, format_string, ...) do { if ((level) == 0 || _debug_ ## name ## _level >= (level)) debug_print(#name, level, fmt::format(FMT_STRING(format_string), ## __VA_ARGS__).c_str()); } while (false)
 
 void NORETURN usererror_str(const char *msg);
 void NORETURN fatalerror_str(const char *msg);