fixed mpl's bug I misunderstood.  Fixed bug I introduced where dataLen was got wrong offset.
fixed mpl's bug I misunderstood.  Fixed bug I introduced where dataLen was got wrong offset.

junjizhi/goexif,rwcarlsen/goexif,bdotdub/goexif,kladd/goexif,porridge/goexif,hydnwang/goexif,xor-gate/goexif2,op/goexif