[Dev-C++] SDL_opengl.h on Dev-C++ 4.9.6.0

[/KY <cru...@in...>]

If I try to compile the following header:

#include <SDL/SDL.h>
#include <SDL/SDL_opengl.h>

(without any additional includes)
using Dev-C++ 4.9.6.0, I obtain the following error:

In file included from test.h:4,
SDL/SDL_opengl.h:2154: redefinition of `PFNGLCOLORSUBTABLEEXTPROC'
GL/gl.h:1493: `PFNGLCOLORSUBTABLEEXTPROC' previously declared here

It works well if I use

#define NO_SDL_GLEXT
#include <SDL/SDL.h>
#include <SDL/SDL_opengl.h>