use dgen 1.33 - has better fb compatibility
new version seems to compile fine with gcc 4.7
no need for disabling of double buffer - it does it automatically now in the new version
compare the binary to run against config file /opt/retropie/configs/all/dispmanx and if it matches, configure LD_LIBRARY_PATH to point to the
dispmanx sdl. this way we can add a binaries name to the config to make it use the sdl dispmanx libs #518