title: SDL_WM_SetCaption not working
body: <p>any idea why the following code isn't working? Nothing happens when it's called, the window title is still untitled. I'm on Ubuntu linux.</p>
  
  <pre><code>SDL_Init( SDL_INIT_VIDEO );
      SDL_WM_SetCaption("Window Title", "Icon Title");
      SDL_Surface* screen =  SDL_SetVideoMode( 512, 512, 32, SDL_HWSURFACE | SDL_DOUBLEBUF );
      Vector2 center =  Vector2(256,256);
      const char* c =  "test";
      SDL_WM_SetCaption( c, 0 );
      SDL_Event event;
  </code></pre>