Fix a regression in term.c rev. 1.229 reported by bentley@:

In UTF-8 output, do not print anything if mchars_spec2cp() returns 0.
In particular, this repairs handling of zero-width spaces (\&).

While here, let mchars_spec2cp() return 0xFFFD instead of -1
if the character is not found, simplifying the using code.
In HTML output, do not print obfuscated ASCII characters and
do not test for one-char escapes, mchars_spec2cp() already does that.

1 files changed, 1 insertions, 1 deletions

diff --git a/mandocdb.c b/mandocdb.c
index 3c212fc6..d03416b5 100644
--- a/mandocdb.c
+++ b/mandocdb.c
@@ -1903,7 +1903,7 @@ render_key(struct mchars *mc, struct str *key)
 		 */
 
 		if (write_utf8) {
-			if (0 == (u = mchars_spec2cp(mc, seq, len)))
+			if ((u = mchars_spec2cp(mc, seq, len)) <= 0)
 				continue;
 			cpp = utfbuf;
 			if (0 == (sz = utf8(u, utfbuf)))