Reset player object before unpacking hero data

Source/pfile.cpp

@@ -301,6 +301,8 @@ bool pfile_ui_set_hero_infos(bool (*uiAddHeroInfo)(_uiheroinfo *))
 
 				auto &player = Players[0];
 
+				player = {};
+
 				if (UnPackPlayer(&pkplr, player, false)) {
 					LoadHeroItems(player);
 					RemoveEmptyInventory(player);
@@ -380,6 +382,8 @@ void pfile_read_player_from_save(uint32_t saveNum, Player &player)
 	HANDLE archive;
 	PlayerPack pkplr;
 
+	player = {};
+
 	archive = OpenSaveArchive(saveNum);
 	if (archive == nullptr)
 		app_fatal("%s", _("Unable to open archive"));

test/writehero_test.cpp

@@ -334,6 +334,7 @@ TEST(Writehero, pfile_write_hero)
 
 	MyPlayerId = 0;
 	MyPlayer = &Players[MyPlayerId];
+	*MyPlayer = {};
 
 	_uiheroinfo info {};
 	strcpy(info.name, "TestPlayer");