Remove dead assignments and increments.

filter.c

 		ts_hex_dump_buf(tmp_data, sizeof(tmp_data), filter->data, filter->filter_len, 0);
 		switch (filter->type) {
 		case FILTER_TYPE_DATA:
-			pos += snprintf(buffer + pos, buf_len - pos, " Offset: %2d Data: %s", filter->offset, tmp_data);
+			snprintf(buffer + pos, buf_len - pos, " Offset: %2d Data: %s", filter->offset, tmp_data);
 			break;
 		case FILTER_TYPE_MASK:
 			ts_hex_dump_buf(tmp_mask, sizeof(tmp_mask), filter->mask, filter->filter_len, 0);
-			pos += snprintf(buffer + pos, buf_len - pos, " Match: %s Mask: %s", tmp_data, tmp_mask);
+			snprintf(buffer + pos, buf_len - pos, " Match: %s Mask: %s", tmp_data, tmp_mask);
 			break;
 		case FILTER_TYPE_LENGTH:
 			pos += snprintf(buffer + pos, buf_len - pos, " Length:");

process.c

 	set_thread_name("tsdec-decode");
 
 	while (!ts->decode_stop) {
-		data = cbuf_peek(ts->decode_buf, req_size, &data_size);
+		cbuf_peek(ts->decode_buf, req_size, &data_size);
 		if (data_size < req_size) {
 			usleep(1000);
 			continue;
 
 	while (!ts->write_stop) {
 		data_size = 0;
-		data = cbuf_peek(ts->write_buf, FRAME_SIZE, &data_size);
+		cbuf_peek(ts->write_buf, FRAME_SIZE, &data_size);
 		if (data_size < FRAME_SIZE) {
 			usleep(5000);
 			continue;

tables.c

 		*sname_len = desc[ofs++];
 		if (*sname_len)
 			*sname = desc + ofs;
-		ofs += *sname_len;
 
 		return 1;
 	}