From 3170c3d15cbbf00b830988d97a79ec6a7b40743e Mon Sep 17 00:00:00 2001
From: Ryan Styrczula <rstyrczula@qube-4d.com>
Date: Thu, 30 Jul 2020 09:21:22 -0400
Subject: [PATCH] FBXExport: Fix crash if scene->mMetaData is null

---
 code/AssetLib/FBX/FBXExporter.cpp | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/code/AssetLib/FBX/FBXExporter.cpp b/code/AssetLib/FBX/FBXExporter.cpp
index 20d166179..99ab7508e 100644
--- a/code/AssetLib/FBX/FBXExporter.cpp
+++ b/code/AssetLib/FBX/FBXExporter.cpp
@@ -405,7 +405,7 @@ void FBXExporter::WriteHeaderExtension ()
 void WritePropInt(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue)
 {
     int value;
-    if (scene->mMetaData->Get(key, value)) {
+    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
         p.AddP70int(key, value);
     } else {
         p.AddP70int(key, defaultValue);
@@ -415,12 +415,12 @@ void WritePropInt(const aiScene* scene, FBX::Node& p, const std::string& key, in
 void WritePropDouble(const aiScene* scene, FBX::Node& p, const std::string& key, double defaultValue)
 {
     double value;
-    if (scene->mMetaData->Get(key, value)) {
+    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
         p.AddP70double(key, value);
     } else {
         // fallback lookup float instead
         float floatValue;
-        if (scene->mMetaData->Get(key, floatValue)) {
+        if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, floatValue)) {
             p.AddP70double(key, (double)floatValue);
         } else {
             p.AddP70double(key, defaultValue);
@@ -431,7 +431,7 @@ void WritePropDouble(const aiScene* scene, FBX::Node& p, const std::string& key,
 void WritePropEnum(const aiScene* scene, FBX::Node& p, const std::string& key, int defaultValue)
 {
     int value;
-    if (scene->mMetaData->Get(key, value)) {
+    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
         p.AddP70enum(key, value);
     } else {
         p.AddP70enum(key, defaultValue);
@@ -441,7 +441,7 @@ void WritePropEnum(const aiScene* scene, FBX::Node& p, const std::string& key, i
 void WritePropColor(const aiScene* scene, FBX::Node& p, const std::string& key, const aiVector3D& defaultValue)
 {
     aiVector3D value;
-    if (scene->mMetaData->Get(key, value)) {
+    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
         // ai_real can be float or double, cast to avoid warnings
         p.AddP70color(key, (double)value.x, (double)value.y, (double)value.z);
     } else {
@@ -452,7 +452,7 @@ void WritePropColor(const aiScene* scene, FBX::Node& p, const std::string& key,
 void WritePropString(const aiScene* scene, FBX::Node& p, const std::string& key, const std::string& defaultValue)
 {
     aiString value; // MetaData doesn't hold std::string
-    if (scene->mMetaData->Get(key, value)) {
+    if (scene->mMetaData != nullptr && scene->mMetaData->Get(key, value)) {
         p.AddP70string(key, value.C_Str());
     } else {
         p.AddP70string(key, defaultValue);