Do not write duplicate id= attributes, they violate HTML syntax.

Append suffixes for disambiguation.  Issue first reported by Jakub
Klinkovsky <j dot l dot k at gmx dot com> (Arch Linux).

1 files changed, 1 insertions, 1 deletions

diff --git a/html.h b/html.h
index 9bf2e524..b6d411f6 100644
--- a/html.h
+++ b/html.h
@@ -133,5 +133,5 @@ void		  print_eqn(struct html *, const struct eqn_box *);
 void		  print_paragraph(struct html *);
 void		  print_endline(struct html *);
 
-char		 *html_make_id(const struct roff_node *);
+char		 *html_make_id(const struct roff_node *, int);
 int		  html_strlen(const char *);