togl: fix MacOS build( fixes #187 )

public/togl/linuxwin/glmgrext.h

@@ -28,16 +28,7 @@
 //===============================================================================
 
 #pragma once
-
+#include "SDL_opengl.h"
-#ifdef OSX
-#include <OpenGL/gl.h>
-#include <OpenGL/glext.h>
-#elif defined(DX_TO_GL_ABSTRACTION)
-#include <GL/gl.h>
-#include <GL/glext.h>
-#else
-#error
-#endif
 
 #ifndef GL_EXT_framebuffer_sRGB
 	#define GL_FRAMEBUFFER_SRGB_EXT                 0x8DB9

public/togl/rendermechanism.h

@@ -34,13 +34,7 @@
 
 #undef PROTECTED_THINGS_ENABLE
 
-#ifdef OSX
+#include "SDL_opengl.h"
-#include <OpenGL/OpenGL.h>
-#else
-#include <GL/gl.h>
-#include <GL/glext.h>
-#endif
-
 #include "tier0/basetypes.h"
 #include "tier0/platform.h"