Add more lua_settop() calls

Author: HaroldCindy

VM/src/lll.cpp

@@ -382,6 +382,7 @@ static int ll_dumplist2string(lua_State *L)
 {
     luaL_checktype(L, 1, LUA_TTABLE);
     luaL_checktype(L, 2, LUA_TSTRING);
+    lua_settop(L, 2);
     auto *h = hvalue(luaA_toobject(L, 1));
     int len = luaH_getn(h);
 

VM/src/llsl.cpp

@@ -598,6 +598,7 @@ static int lsl_table_concat(lua_State *L)
     if (lua_type(L, 1) != LUA_TTABLE && lua_type(L, 2) != LUA_TTABLE)
         luaL_errorL(L, "At least one argument must be a table");
 
+    lua_settop(L, 2);
     lua_checkstack(L, 4);
 
     // Note: reversed because of LSL evaluation order!