Call msg_callback with correct length parameter if ssl3_write_bytes had to

be called multiple times

ssl/s3_both.c

@@ -135,7 +135,7 @@ int ssl3_do_write(SSL *s, int type)
 	if (ret == s->init_num)
 		{
 		if (s->msg_callback)
-			s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)s->init_num, s, s->msg_callback_arg);
+			s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
 		return(1);
 		}
 	s->init_off+=ret;