9718 update mandoc to 1.14.4

@@ -1,6 +1,6 @@
-/*      $Id: libmandoc.h,v 1.70 2017/07/08 17:52:49 schwarze Exp $ */
+/*      $Id: libmandoc.h,v 1.71 2018/04/09 22:27:04 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2013, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any

@@ -64,10 +64,10 @@
                         const char *, int);
 void             roff_man_reset(struct roff_man *);
 enum rofferr     roff_parseln(struct roff *, int, struct buf *, int *);
 void             roff_endparse(struct roff *);
 void             roff_setreg(struct roff *, const char *, int, char sign);
-int              roff_getreg(const struct roff *, const char *);
+int              roff_getreg(struct roff *, const char *);
 char            *roff_strdup(const struct roff *, const char *);
 int              roff_getcontrol(const struct roff *,
                         const char *, int *);
 int              roff_getformat(const struct roff *);