Codechange: IniGroup::GetItem() can now be const. (#10966)

src/ini_load.cpp

@@ -86,7 +86,7 @@ IniGroup::~IniGroup()
  * @param name   name of the item to find.
  * @return the requested item or nullptr if not found.
  */
-IniItem *IniGroup::GetItem(const std::string &name)
+IniItem *IniGroup::GetItem(const std::string &name) const
 {
 	for (IniItem *item = this->item; item != nullptr; item = item->next) {
 		if (item->name == name) return item;

src/ini_type.h

@@ -44,7 +44,7 @@ struct IniGroup {
 	IniGroup(struct IniLoadFile *parent, const std::string &name);
 	~IniGroup();
 
-	IniItem *GetItem(const std::string &name);
+	IniItem *GetItem(const std::string &name) const;
 	IniItem &GetOrCreateItem(const std::string &name);
 	void RemoveItem(const std::string &name);
 	void Clear();