closes https://github.com/assimp/assimp/issues/3198: make aiMaterial::GetName const.

code/Material/MaterialSystem.cpp

@@ -402,7 +402,7 @@ aiMaterial::~aiMaterial() {
 }
 
 // ------------------------------------------------------------------------------------------------
-aiString aiMaterial::GetName() {
+aiString aiMaterial::GetName() const {
     aiString name;
     Get(AI_MATKEY_NAME, name);
 

include/assimp/material.inl

@@ -5,8 +5,6 @@ Open Asset Import Library (assimp)
 
 Copyright (c) 2006-2020, assimp team
 
-
-
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,