From 7c7f258c2d3f68b147e3cbf366a05db03e6c7f8f Mon Sep 17 00:00:00 2001
From: toaster <rollerorbital@gmail.com>
Date: Thu, 5 Dec 2019 09:28:28 +0000
Subject: [PATCH] Another potential papersprite crash fix, but way more
 confident about this one.

---
 src/r_things.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/r_things.c b/src/r_things.c
index 90d5f3fd3..0def36d8a 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -1340,9 +1340,10 @@ static void R_ProjectSprite(mobj_t *thing)
 		if ((range = x2 - x1) <= 0)
 			return;
 
+		range++; // fencepost problem
+
 		scalestep = (yscale2 - yscale)/range;
-		scalestep = scalestep ? scalestep : 1;
-		xscale = FixedDiv(range<<FRACBITS, abs(offset2))+1;
+		xscale = FixedDiv(range<<FRACBITS, abs(offset2));
 
 		// The following two are alternate sorting methods which might be more applicable in some circumstances. TODO - maybe enable via MF2?
 		// sortscale = max(yscale, yscale2);