On Thu, 18 Dec 2014 01:40:18 -0800
Paul Eggert <eggert@cs.ucla.edu> wrote:
> Why?  The (only) caller with WCP != NULL doesn't use *WCP when
> skip_remains_mb (D, P, ..., WCP) returns P.  So it's OK to not set *WCP
> in that case.

Thanks, I understood that you said.  You are right.  I changed the patch
so that always_character_boundary is not pruned even if WCP != NULL, and
fixed the API document.