From f0460292c9ab0d3a19aae530a59e6c195132092a Mon Sep 17 00:00:00 2001
From: "timeless%mac.com" <timeless%mac.com>
Date: Fri, 11 May 2001 06:22:11 +0000
Subject: [PATCH] Bugzilla Bug 79213 nsEventStateManager::PreHandleEvent
 dereference a NULL nsCOMPtr with operator->().: bandage fix. r=saari sr=jst.

---
 content/events/src/nsEventStateManager.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/content/events/src/nsEventStateManager.cpp b/content/events/src/nsEventStateManager.cpp
index 9e14c1359c7..88a9d4e7535 100644
--- a/content/events/src/nsEventStateManager.cpp
+++ b/content/events/src/nsEventStateManager.cpp
@@ -480,6 +480,8 @@ nsEventStateManager::PreHandleEvent(nsIPresContext* aPresContext,
       nsCOMPtr<nsIScriptGlobalObject> globalObj;
       mDocument->GetScriptGlobalObject(getter_AddRefs(globalObj));
       nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(globalObj));
+      NS_ASSERTION(win, "win is null.  this happens [often on xlib builds].  see bug #79213");
+      if (!win) return NS_ERROR_NULL_POINTER;
       win->GetRootFocusController(getter_AddRefs(focusController));
 
       if (focusController) {