glTF exporter: Fix retrieving attribute after recent merged

scripts/addons_core/io_scene_gltf2/__init__.py

@@ -5,7 +5,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (4, 2, 38),
+    "version": (4, 2, 39),
     'blender': (4, 2, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

scripts/addons_core/io_scene_gltf2/blender/exp/material/gltf2_blender_search_node_tree.py

@@ -658,8 +658,7 @@ def get_color_attrib(nav):
         if nav.node.attribute_type == 'GEOMETRY':
             # Does NOT use color attribute when blank
             name = nav.node.attribute_name
-            if name:
-                return name
+            return name  # Fixed name or "" for active color
 
     return None