fix SwInterHyphInfo commit again

The original commit was eb56848029a3b26a9d4f07a55364749e9e7d8339
"convert SwInterHyphInfo from xub_StrLen->sal_Int32"

My first attempt at fixing the commit was
a073e81c3acb0c4aa3bc4fde146b6eb9869738e1.

This is the second attempt.

Change-Id: I030c0a3107e1321006744473efe3ca3341251ad4