log: print log entry terminator even if the message is empty

This eliminates a special case in the show_log() function, to help
simplify the terminator semantics.  Now show_log() always prints a
newline after the log entry when use_terminator is set, even if the log
message is empty.

This change should only affect the --pretty=tformat output, since that
was the only way to trigger this special case.

Signed-off-by: Adam Simpkins <adam@adamsimpkins.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

log-tree.c

@@ -307,11 +307,10 @@ void show_log(struct rev_info *opt)
 	if (opt->show_log_size)
 		printf("log size %i\n", (int)msgbuf.len);
 
-	if (msgbuf.len) {
+	if (msgbuf.len)
 		fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
-		if (opt->use_terminator)
-			putchar('\n');
-	}
+	if (opt->use_terminator)
+		putchar('\n');
 	strbuf_release(&msgbuf);
 }