[Bf-blender-cvs] [ebccb23bba6] tmp-mak-012623: Fix linux/mac warnings.

[Michael Kowalski]

Commit: ebccb23bba6b8ba3a74bbd078b1d3622032fe778
Author: Michael Kowalski
Date:   Thu Jan 26 19:45:00 2023 -0500
Branches: tmp-mak-012623
https://developer.blender.org/rBebccb23bba6b8ba3a74bbd078b1d3622032fe778

Fix linux/mac warnings.

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

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 0c179ceae48..3ee5e666d38 100644
--- a/source/blender/io/usd/intern/usd_reader_stage.cc
+++ b/source/blender/io/usd/intern/usd_reader_stage.cc
@@ -355,7 +355,7 @@ void USDStageReader::fake_users_for_unused_materials()
 {
   /* Iterate over the imported materials and set a fake user for any unused
    * materials. */
-  for (const std::pair<std::string, std::string> &path_mat_pair : settings_.usd_path_to_mat_name) {
+  for (const std::pair<const std::string, std::string> &path_mat_pair : settings_.usd_path_to_mat_name) {
 
     std::map<std::string, Material *>::iterator mat_it = settings_.mat_name_to_mat.find(
         path_mat_pair.second);