From daf022b7e0cd219e7688af8a36fe4c58def86e9f Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sat, 20 Jan 2018 17:49:56 +0100
Subject: [PATCH] protected against negative ticks

---
 blizzard.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/blizzard.cpp b/blizzard.cpp
index a0c5c614..a900e1f5 100644
--- a/blizzard.cpp
+++ b/blizzard.cpp
@@ -215,6 +215,7 @@ void drawArrowTraps() {
       if((c->wparam & 7) == 3 && !shmup::on) {
 //        queueline(t0 * randomPointIn(r[0]->type), t1 * randomPointIn(r[1]->type), 0xFFFFFFFF, 4, PPR_ITEM);
         int tt = ticks % 401;
+        if(tt < 0) tt += 401;
         
         for(int u=0; u<2; u++) {
           transmatrix& tu = u ? t0 : t1;