[SDL/Opengl] Problem z odpaleniem programu

#include <sdl/sdl.h>
#include <gl/gl.h>
#include <sdl/sdl_opengl.h>
SDL_Surface * surface;
SDL_Event event;
GLuint texture;
GLenum texture_format;
GLint nofcolors;

int load() {
    nofcolors = 3;
    texture_format = GL_RGB;
    texture = NULL;
   
    surface = SDL_LoadBMP( "flower.bmp" );
   
    glGenTextures( 1, & texture );
    glBindTexture( GL_TEXTURE_2D, texture );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
   
    glTexImage2D( GL_TEXTURE_2D, 0, nofcolors, surface->w, surface->h, 0, texture_format, GL_UNSIGNED_BYTE, surface->pixels );
    if( surface ) {
        SDL_FreeSurface( surface );
    }
}

void draw() {
    // Clear the screen before drawing
    glClear( GL_COLOR_BUFFER_BIT );
   
    // Bind the texture to which subsequent calls refer to
    glBindTexture( GL_TEXTURE_2D, texture );
   
    glBegin( GL_QUADS );
    // Top-left vertex (corner)
    glTexCoord2i( 0, 0 );
    glVertex3f( 100, 100, 0 );
   
    // Bottom-left vertex (corner)
    glTexCoord2i( 1, 0 );
    glVertex3f( 228, 100, 0 );
   
    // Bottom-right vertex (corner)
    glTexCoord2i( 1, 1 );
    glVertex3f( 228, 228, 0 );
    // Top-right vertex (corner)
    glTexCoord2i( 0, 1 );
    glVertex3f( 100, 228, 0 );
    glEnd();
    glLoadIdentity();
    SDL_GL_SwapBuffers();
}

int init()
{
    SDL_Surface * screen;
    SDL_Init( SDL_INIT_VIDEO );
    // Slightly different SDL initialization
   
    screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL );
    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
}


void init_GL()
{
    // Set the OpenGL state after creating the context with SDL_SetVideoMode
   
    glClearColor( 0, 0, 0, 0 );
   
    glEnable( GL_TEXTURE_2D ); // Need this to display a texture
   
    glViewport( 0, 0, 640, 480 );
   
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
   
    glOrtho( 0, 640, 480, 0, - 1, 1 );
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();
}


int main( int argc, char * argv[] )
{
    //Make sure the program waits for a quit
    bool quit = false;
    init();
    init_GL();
    load();
    draw();
    while( quit == false )
    {
        if( SDL_PollEvent( & event ) )
        {
            //If a key was pressed
            if( event.type == SDL_KEYDOWN )
            {
                //Adjust the velocity
                switch( event.key.keysym.sym )
                {
                case SDLK_ESCAPE:
                    quit = true;
                    break;
                }
            }
           
        }
    }
}