From 6e7f2226083a4c4455ea9302fe01f254726e6a90 Mon Sep 17 00:00:00 2001
From: "Anthony J. Thibault" <tony@highfidelity.io>
Date: Tue, 5 Nov 2019 14:16:10 -0800
Subject: [PATCH] Fix for assert in AnimBlendDirectional on startup

Specifically, std::vector subscript out of range.
---
 libraries/animation/src/AnimBlendDirectional.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libraries/animation/src/AnimBlendDirectional.cpp b/libraries/animation/src/AnimBlendDirectional.cpp
index 4e7c67f276..4cc67683da 100644
--- a/libraries/animation/src/AnimBlendDirectional.cpp
+++ b/libraries/animation/src/AnimBlendDirectional.cpp
@@ -96,7 +96,9 @@ const AnimPoseVec& AnimBlendDirectional::evaluate(const AnimVariantMap& animVars
             }
         }
         _poses.resize(minSize);
-        blend4(minSize, &poseVecs[0][0], &poseVecs[1][0], &poseVecs[2][0], &poseVecs[3][0], &alphas[0], &_poses[0]);
+        if (minSize > 0) {
+            blend4(minSize, &poseVecs[0][0], &poseVecs[1][0], &poseVecs[2][0], &poseVecs[3][0], &alphas[0], &_poses[0]);
+        }
 
         // animation stack debug stats
         for (int i = 0; i < 9; i++) {