From b5028efc1fa862073c908c435f84098ccd246fdc Mon Sep 17 00:00:00 2001
From: Charles Pigott <charlespigott@googlemail.com>
Date: Sun, 14 Oct 2018 23:36:14 +0100
Subject: Fix: Protect against a few out of bounds or uninitialised usage
 errors

---
 src/newgrf_spritegroup.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/newgrf_spritegroup.cpp')

diff --git a/src/newgrf_spritegroup.cpp b/src/newgrf_spritegroup.cpp
index 086cbf346..59b845f10 100644
--- a/src/newgrf_spritegroup.cpp
+++ b/src/newgrf_spritegroup.cpp
@@ -154,6 +154,7 @@ static uint32 RotateRight(uint32 val, uint32 rot)
 {
 	/* Do not rotate more than necessary */
 	rot %= 32;
+	assert(rot > 0);
 
 	return (val >> rot) | (val << (32 - rot));
 }
-- 
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