[SDL, C++] Błąd: "Unhandled exception at (...) in (...)"

#include <SDL.h>
#include <iostream>
#include "SDL_ttf.h"
#include "stdio.h"
#include <string.h>
using namespace std;


SDL_Surface * screen = NULL;
SDL_Surface * bufor = NULL;
SDL_Event event;
Uint32 color = 0;

int main( int argc, char * args[] )
{
    SDL_Init( SDL_INIT_EVERYTHING );
    screen = SDL_SetVideoMode( 640, 480, 32, SDL_SWSURFACE | SDL_DOUBLEBUF );
    //color = SDL_MapRGB(bufor->format, 0, 0, 255);
    //SDL_SetColorKey(bufor,SDL_RLEACCEL,color);
    //######################################
    bool exit = false;
    //######################################
    while( !exit )
    {
        while( SDL_PollEvent( & event ) )
        {
            if( event.type == SDL_QUIT )
            {
                exit = true;
            }
        }
       
        SDL_Flip( screen );
    }
   
    SDL_Quit();
    return 0;
}

SDL_Surface * bufor = new SDL_Surface( /*argumenty*/ );