Refactor interpreter constructor and duel constructor (#794)

duel.cpp

@@ -31,8 +31,8 @@ duel::~duel() {
 		delete pgroup;
 	for(auto& peffect : effects)
 		delete peffect;
-	delete lua;
 	delete game_field;
+	delete lua;
 }
 void duel::clear() {
 	for(auto& pcard : cards)

interpreter.cpp

@@ -14,13 +14,10 @@
 #include "ocgapi.h"
 #include "interpreter.h"
 
-interpreter::interpreter(duel* pd, bool enable_unsafe_libraries): coroutines(256) {
+interpreter::interpreter(duel* pd, bool enable_unsafe_libraries) : coroutines(256), pduel(pd) {
 	lua_state = luaL_newstate();
 	current_state = lua_state;
-	pduel = pd;
 	std::memcpy(lua_getextraspace(lua_state), &pd, LUA_EXTRASPACE); //set_duel_info
-	no_action = 0;
-	call_depth = 0;
 	//Initial
 	luaL_requiref(lua_state, "base", luaopen_base, 0);
 	lua_pop(lua_state, 1);

interpreter.h

@@ -44,14 +44,14 @@ public:
 	using param_list = std::list<std::pair<lua_param, LuaParamType>>;
 	
 	duel* pduel;
-	char msgbuf[64];
+	char msgbuf[64]{};
 	lua_State* lua_state;
 	lua_State* current_state;
 	param_list params;
 	param_list resumes;
 	coroutine_map coroutines;
-	int32_t no_action;
-	int32_t call_depth;
+	int32_t no_action{};
+	int32_t call_depth{};
 
 	explicit interpreter(duel* pd, bool enable_unsafe_libraries);
 	~interpreter();