Commit: 85989931570f13e74024c790956f1ef7088c5e10
Author: Ankit Meel
Date:   Sun Aug 9 17:32:23 2020 +0530
Branches: soc-2020-io-performance
https://developer.blender.org/rB85989931570f13e74024c790956f1ef7088c5e10

Fix wrong material exporter assert added recently.

Since Alpha in RGBA is not written to the MTL file, callers
use array of length 3.

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

M       source/blender/io/wavefront_obj/intern/wavefront_obj_ex_mtl.cc

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

diff --git a/source/blender/io/wavefront_obj/intern/wavefront_obj_ex_mtl.cc 
b/source/blender/io/wavefront_obj/intern/wavefront_obj_ex_mtl.cc
index d0e78bc48eb..1768e9dae53 100644
--- a/source/blender/io/wavefront_obj/intern/wavefront_obj_ex_mtl.cc
+++ b/source/blender/io/wavefront_obj/intern/wavefront_obj_ex_mtl.cc
@@ -63,7 +63,7 @@ static void copy_property_from_node(MutableSpan<float> 
r_property,
       break;
     }
     case SOCK_RGBA: {
-      BLI_assert(r_property.size() == 4);
+      BLI_assert(r_property.size() == 3);
       bNodeSocketValueRGBA *socket_def_value = 
static_cast<bNodeSocketValueRGBA *>(
           socket->default_value);
       copy_v3_v3(r_property.data(), socket_def_value->value);

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