-struct position *compute_motion (ptrdiff_t from, EMACS_INT fromvpos,
- EMACS_INT fromhpos, int did_motion,
- ptrdiff_t to, EMACS_INT tovpos,
- EMACS_INT tohpos,
+struct position *compute_motion (ptrdiff_t from, ptrdiff_t frombyte,
+ EMACS_INT fromvpos, EMACS_INT fromhpos,
+ bool did_motion, ptrdiff_t to,
+ EMACS_INT tovpos, EMACS_INT tohpos,