From 634fc12875d141baec8e3c0b5d4715f0e53ba388 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Janiszewski?= <janisozaur@gmail.com>
Date: Sun, 21 Aug 2016 15:20:30 +0100
Subject: [PATCH] Add assert for widget index invalidation

---
 src/interface/window.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/interface/window.c b/src/interface/window.c
index 019f6b4c26..a427ae9c86 100644
--- a/src/interface/window.c
+++ b/src/interface/window.c
@@ -976,6 +976,12 @@ void widget_invalidate(rct_window *w, int widgetIndex)
 	rct_widget* widget;
 
 	assert(w != NULL);
+#if DEBUG
+	for (int i = 0; i <= widgetIndex; i++) {
+		assert(w->widgets[i].type != WWT_LAST);
+	}
+#endif
+
 	widget = &w->widgets[widgetIndex];
 	if (widget->left == -2)
 		return;