From 2a2646fe43887bf19494769f562904c4d2ed551a Mon Sep 17 00:00:00 2001
From: Zack Middleton <zack@cloemail.com>
Date: Tue, 28 May 2019 21:00:02 -0500
Subject: [PATCH] Fix IQM quat normalize fail case

Should only happen with invalid models though.
---
 code/renderergl1/tr_model_iqm.c | 3 ++-
 code/renderergl2/tr_model_iqm.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/code/renderergl1/tr_model_iqm.c b/code/renderergl1/tr_model_iqm.c
index 59444a93..fe205ff4 100644
--- a/code/renderergl1/tr_model_iqm.c
+++ b/code/renderergl1/tr_model_iqm.c
@@ -154,7 +154,8 @@ static vec_t QuatNormalize2( const quat_t v, quat_t out) {
 		out[2] = v[2]*ilength;
 		out[3] = v[3]*ilength;
 	} else {
-		out[0] = out[1] = out[2] = out[3] = 0;
+		out[0] = out[1] = out[2] = 0;
+		out[3] = -1;
 	}
 
 	return length;
diff --git a/code/renderergl2/tr_model_iqm.c b/code/renderergl2/tr_model_iqm.c
index eff80312..fc345a32 100644
--- a/code/renderergl2/tr_model_iqm.c
+++ b/code/renderergl2/tr_model_iqm.c
@@ -154,7 +154,8 @@ static vec_t QuatNormalize2( const quat_t v, quat_t out) {
 		out[2] = v[2]*ilength;
 		out[3] = v[3]*ilength;
 	} else {
-		out[0] = out[1] = out[2] = out[3] = 0;
+		out[0] = out[1] = out[2] = 0;
+		out[3] = -1;
 	}
 
 	return length;