[Bf-extensions-cvs] [3f0687b] dxf_import: Fix T41396: FBX export fails with some very simple material setups.

[Bastien Montagne]

Commit: 3f0687b8ad95e7fec6f1469389f08f5dd0915f32
Author: Bastien Montagne
Date:   Mon Aug 11 13:03:43 2014 +0200
Branches: dxf_import
https://developer.blender.org/rBA3f0687b8ad95e7fec6f1469389f08f5dd0915f32

Fix T41396: FBX export fails with some very simple material setups.

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

M	io_scene_fbx/export_fbx_bin.py

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

diff --git a/io_scene_fbx/export_fbx_bin.py b/io_scene_fbx/export_fbx_bin.py
index 228d993..16ff3ba 100644
--- a/io_scene_fbx/export_fbx_bin.py
+++ b/io_scene_fbx/export_fbx_bin.py
@@ -1101,7 +1101,8 @@ def fbx_data_mesh_elements(root, me_obj, scene_data, done_meshes):
                 me.polygons.foreach_get("material_index", t_pm)
 
                 # We have to validate mat indices, and map them to FBX indices.
-                blmats_to_fbxmats_idxs = [me_fbxmats_idx[m] for m in me_blmats]
+                # Note a mat might not be in me_fbxmats_idx (e.g. node mats are ignored).
+                blmats_to_fbxmats_idxs = [me_fbxmats_idx[m] for m in me_blmats if m in me_fbxmats_idx]
                 mat_idx_limit = len(blmats_to_fbxmats_idxs)
                 def_mat = blmats_to_fbxmats_idxs[0]
                 _gen = (blmats_to_fbxmats_idxs[m] if m < mat_idx_limit else def_mat for m in t_pm)