From 845cee2578c16e411e89925272220c4d8934b576 Mon Sep 17 00:00:00 2001
From: Andrey Akhmichin <15944199+nekonomicon@users.noreply.github.com>
Date: Thu, 14 Dec 2023 14:57:00 +0500
Subject: [PATCH] utils: mdldec: smd.c: prevent division by zero.

---
 utils/mdldec/smd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/utils/mdldec/smd.c b/utils/mdldec/smd.c
index a21260db..43c533c4 100644
--- a/utils/mdldec/smd.c
+++ b/utils/mdldec/smd.c
@@ -440,9 +440,12 @@ static void WriteFrameInfo( FILE *fp, mstudioanim_t *anim, mstudioseqdesc_t *seq
 
 		if( bone->parent == -1 )
 		{
-			scale = frame / (float)( seqdesc->numframes - 1 );
+			if( seqdesc->numframes > 1 && frame > 0 )
+			{
+				scale = frame / (float)( seqdesc->numframes - 1 );
 
-			VectorMA( motion, scale, seqdesc->linearmovement, motion );
+				VectorMA( motion, scale, seqdesc->linearmovement, motion );
+			}
 
 			ProperBoneRotationZ( motion, 270.0f );
 		}