Correcting size types in (Un)PackSegmentsOp
Correcting size types in (Un)PackSegmentsOp

int32 is too small for large sequence & batch size.

Yangqing/caffe2,Yangqing/caffe2,xzturn/caffe2,xzturn/caffe2,Yangqing/caffe2,caffe2/caffe2,Yangqing/caffe2,xzturn/caffe2,xzturn/caffe2,Yangqing/caffe2,xzturn/caffe2