Bug 504464 nsCanvasRenderingContext2D::Restore checks to see if unsigned mSaveCount is negative

r=vlad

--HG--
extra : rebase_source : 794d20216ef70e2599f484c871217d557f874be2

content/canvas/src/nsCanvasRenderingContext2D.cpp

@@ -1118,8 +1118,6 @@ nsCanvasRenderingContext2D::Restore()
 {
     if (mSaveCount == 0)
         return NS_OK;
-    if (mSaveCount < 0)
-        return NS_ERROR_DOM_INVALID_STATE_ERR;
 
     mStyleStack.RemoveElementAt(mSaveCount);
     mThebes->Restore();