Re: Equivalent to nullptr

[Stanislav Blinov via Digitalmars-d-learn]

In the meantime, you can get around the issue by redeclaring the 
function with another name and loading it manually just after 
calling DerelictSDL2.load():

import derelict.sdl2.sdl;
__gshared SDL_bool function (const(SDL_Point)*, int, 
const(SDL_Rect)*, SDL_Rect*) SDL_EnclosePoints_;

void main()
{
   DerelictSDL2.load();
   DerelictSDL2.bindFunc(cast(void**)&SDL_EnclosePoints_, 
"SDL_EnclosePoints");
   // ...
}

Now you'd need to call SDL_EnclosePoints_ instead of 
SDL_EnclosePoints.