segmentation fault on Linux and Skylake Windows with analysis-mode=save\load

[Mahesh Pittala]

CLI: BasketballDrive_1920x1080_50.y4m --preset veryslow --no-cutree --analysis-mode=load --bitrate 7000 --tskip-fast --no-info --hash=1 --psnr --ssim --asm=SSSE3

Tested tip: 1.8+186-5276fbdce4bd cmake options enabled: checked build depth: 8bpp preset: veryslow

log - http://pastie.org/10648889

[Deepthi Nandakumar]

fixed with bcaf4c5c04e9