Fix rare case where script would fail to set LOD after disabling auto LOD

interface/src/LODManager.cpp

@@ -54,6 +54,7 @@ void LODManager::setRenderTimes(float presentTime, float engineRunTime, float ba
 }
 
 void LODManager::autoAdjustLOD(float realTimeDelta) {
+    std::lock_guard<std::mutex> { _automaticLODLock };
  
     // The "render time" is the worse of:
     // - engineRunTime: Time spent in the render thread in the engine producing the gpu::Frame N
@@ -235,6 +236,7 @@ void LODManager::resetLODAdjust() {
 }
 
 void LODManager::setAutomaticLODAdjust(bool value) {
+    std::lock_guard<std::mutex> { _automaticLODLock };
     _automaticLODAdjust = value;
     emit autoLODChanged();
 }

interface/src/LODManager.h

@@ -12,6 +12,8 @@
 #ifndef hifi_LODManager_h
 #define hifi_LODManager_h
 
+#include <mutex>
+
 #include <DependencyManager.h>
 #include <NumericalConstants.h>
 #include <OctreeConstants.h>
@@ -230,6 +232,7 @@ signals:
 private:
     LODManager();
 
+    std::mutex _automaticLODLock;
     bool _automaticLODAdjust = true;
 
     float _presentTime{ 0.0f }; // msec