Apply header guard check

include/Nazara/Physics2D/DebugOff.hpp

@@ -2,6 +2,8 @@
 // This file is part of the "Nazara Engine - Physics2D module"
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
+// no header guards
+
 // On suppose que Debug.hpp a déjà été inclus, tout comme Config.hpp
 #if NAZARA_PHYSICS2D_MANAGE_MEMORY
 	#undef delete