From 171889e6bc9b2ca9e7dcabd0ccb0f4780e0b2eac Mon Sep 17 00:00:00 2001
From: "reed@reedloden.com" <none@none>
Date: Tue, 29 Jan 2008 20:37:11 -0800
Subject: [PATCH] Bug 412530 - "context.restore throws exception if no saved
 state instead of doing nothing per spec" [p=taken.spc@gmail.com (KUROSAWA,
 Takeshi) r+a1.9=vlad]

---
 content/canvas/src/nsCanvasRenderingContext2D.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/content/canvas/src/nsCanvasRenderingContext2D.cpp b/content/canvas/src/nsCanvasRenderingContext2D.cpp
index d9236f08054..33e5954e5a3 100644
--- a/content/canvas/src/nsCanvasRenderingContext2D.cpp
+++ b/content/canvas/src/nsCanvasRenderingContext2D.cpp
@@ -827,7 +827,9 @@ nsCanvasRenderingContext2D::Save()
 NS_IMETHODIMP
 nsCanvasRenderingContext2D::Restore()
 {
-    if (mSaveCount <= 0)
+    if (mSaveCount == 0)
+        return NS_OK;
+    if (mSaveCount < 0)
         return NS_ERROR_DOM_INVALID_STATE_ERR;
 
     mStyleStack.RemoveElementAt(mSaveCount);