[Bf-extensions-cvs] [139166de] master: glTF exporter: fix mesh export when material slot is created but empty

[Julien Duroure]

Commit: 139166de51d3c7f8f09de49fcd149c7183ff60cd
Author: Julien Duroure
Date:   Tue Jun 11 11:25:12 2019 +0200
Branches: master
https://developer.blender.org/rBA139166de51d3c7f8f09de49fcd149c7183ff60cd

glTF exporter: fix mesh export when material slot is created but empty

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

M	io_scene_gltf2/__init__.py
M	io_scene_gltf2/blender/exp/gltf2_blender_gather_nodes.py

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

diff --git a/io_scene_gltf2/__init__.py b/io_scene_gltf2/__init__.py
index 24bb39d9..32f642ff 100755
--- a/io_scene_gltf2/__init__.py
+++ b/io_scene_gltf2/__init__.py
@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (0, 9, 25),
+    "version": (0, 9, 26),
     'blender': (2, 80, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_gather_nodes.py b/io_scene_gltf2/blender/exp/gltf2_blender_gather_nodes.py
index ba303c42..1889154d 100755
--- a/io_scene_gltf2/blender/exp/gltf2_blender_gather_nodes.py
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_gather_nodes.py
@@ -241,7 +241,7 @@ def __gather_mesh(blender_object, export_settings):
         blender_mesh = blender_object.data
         skip_filter = False
 
-    material_names = tuple([ms.material.name for ms in blender_object.material_slots])
+    material_names = tuple([ms.material.name for ms in blender_object.material_slots if ms.material is not None])
     result = gltf2_blender_gather_mesh.gather_mesh(blender_mesh.name,
                                                    vertex_groups,
                                                    modifiers,