fix crash when undoing if there were no snapshots

jacob1 · jacob1 · commit 61e19a3237fe · 2017-02-18T23:41:52.000-05:00
diff --git a/src/gui/game/GameController.cpp b/src/gui/game/GameController.cpp
@@ -233,6 +233,8 @@ GameController::~GameController()
 void GameController::HistoryRestore()
 {
 	std::deque<Snapshot*> history = gameModel->GetHistory();
+	if (!history.size())
+		return;
 	unsigned int historyPosition = gameModel->GetHistoryPosition();
 	unsigned int newHistoryPosition = std::max((int)historyPosition-1, 0);
 	// When undoing, save the current state as a final redo

Original file line number	Diff line number	Diff line change
`@@ -233,6 +233,8 @@ GameController::~GameController()`
`233`	`233`	`void GameController::HistoryRestore()`
`234`	`234`	`{`
`235`	`235`	`std::deque<Snapshot*> history = gameModel->GetHistory();`
	`236`	`+ if (!history.size())`
	`237`	`+ return;`
`236`	`238`	`unsigned int historyPosition = gameModel->GetHistoryPosition();`
`237`	`239`	`unsigned int newHistoryPosition = std::max((int)historyPosition-1, 0);`
`238`	`240`	`// When undoing, save the current state as a final redo`