DataManager: update GetCodePointer()

gframe/data_manager.cpp

@@ -172,10 +172,10 @@ bool DataManager::GetData(unsigned int code, CardData* pData) {
 	}
 	return true;
 }
-code_pointer DataManager::GetCodePointer(unsigned int code) {
+code_pointer DataManager::GetCodePointer(unsigned int code) const {
 	return _datas.find(code);
 }
-string_pointer DataManager::GetStringPointer(unsigned int code) {
+string_pointer DataManager::GetStringPointer(unsigned int code) const {
 	return _strings.find(code);
 }
 bool DataManager::GetString(int code, CardString* pStr) {

gframe/data_manager.h

@@ -23,8 +23,8 @@ public:
 	void ReadStringConfLine(const char* linebuf);
 	bool Error(spmemvfs_db_t* pDB, sqlite3_stmt* pStmt = 0);
 	bool GetData(unsigned int code, CardData* pData);
-	code_pointer GetCodePointer(unsigned int code);
-	string_pointer GetStringPointer(unsigned int code);
+	code_pointer GetCodePointer(unsigned int code) const;
+	string_pointer GetStringPointer(unsigned int code) const;
 	bool GetString(int code, CardString* pStr);
 	const wchar_t* GetName(int code);
 	const wchar_t* GetText(int code);