mailinfo: move check for metainfo_charset to convert_to_utf8()

All callers of this function refrain from calling it when
mi->metainfo_charset is NULL; move the check to the callee,
as it already has a few conditions at its beginning to turn
it into a no-op.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/mailinfo.c b/builtin/mailinfo.c
index 0b49bf6a1a5a7c36ececef42a4f421a82f9bdf76..1048a46e40aa2cf51f84606abf8ea5655e65c0d6 100644 (file)
--- a/builtin/mailinfo.c
+++ b/builtin/mailinfo.c
@@ -384,7 +384,7 @@ static void convert_to_utf8(struct mailinfo *mi,
 {
        char *out;
 
-       if (!charset || !*charset)
+       if (!mi->metainfo_charset || !charset || !*charset)
                return;
 
        if (same_encoding(mi->metainfo_charset, charset))
@@ -459,8 +459,7 @@ static void decode_header(struct mailinfo *mi, struct strbuf *it)
                        dec = decode_q_segment(&piecebuf, 1);
                        break;
                }
-               if (mi->metainfo_charset)
-                       convert_to_utf8(mi, dec, charset_q.buf);
+               convert_to_utf8(mi, dec, charset_q.buf);
 
                strbuf_addbuf(&outbuf, dec);
                strbuf_release(dec);
@@ -674,8 +673,7 @@ static int handle_commit_msg(struct mailinfo *mi, struct strbuf *line)
                mi->header_stage = 0;
 
        /* normalize the log message to UTF-8. */
-       if (mi->metainfo_charset)
-               convert_to_utf8(mi, line, charset.buf);
+       convert_to_utf8(mi, line, charset.buf);
 
        if (mi->use_scissors && is_scissors_line(line)) {
                int i;