Correctly handle the availability of Xrender in X11_CreateRenderer and X11_DisplayModeChanged. Fixed the XRenderPictureAttributes value in X11_CreateRenderer with graphics_exposures = False. Start work on Xrender specific additions to X11_TextureData and X11_CreateTexture.

/*
 *  jumphack.h
 *  SDLiPhoneOS
 *
 */

#ifndef _jumphack_h
#define _jumphack_h

#include "setjmp.h"

/* see SDL_uikitevents.m for more info */

extern jmp_buf *jump_env();

#endif