[Bf-blender-cvs] [1d21e78a57a] usd-importer-T81257-merge: USD Import: stage reader validation and cleanup.

[makowalski]

Commit: 1d21e78a57a24412711bce005f70ff6b9494a44e
Author: makowalski
Date:   Thu Mar 11 19:28:50 2021 -0500
Branches: usd-importer-T81257-merge
https://developer.blender.org/rB1d21e78a57a24412711bce005f70ff6b9494a44e

USD Import: stage reader validation and cleanup.

Added USDStageReader validation and guard against null
stage in the USDStageReader destructor.

===================================================================

M	source/blender/io/usd/intern/usd_reader_stage.cc

===================================================================

diff --git a/source/blender/io/usd/intern/usd_reader_stage.cc b/source/blender/io/usd/intern/usd_reader_stage.cc
index e9bd4a80641..cc52847592f 100644
--- a/source/blender/io/usd/intern/usd_reader_stage.cc
+++ b/source/blender/io/usd/intern/usd_reader_stage.cc
@@ -63,13 +63,14 @@ USDStageReader::~USDStageReader()
 {
   clear_readers();
 
-  stage_->Unload();
+  if (stage_) {
+    stage_->Unload();
+  }
 }
 
 bool USDStageReader::valid() const
 {
-  // TODO: Implement
-  return true;
+  return stage_;
 }
 
 /* Returns true if the given prim should be excluded from the