From 63b38e25d796ee94e046616d2c7e90214cacc8d7 Mon Sep 17 00:00:00 2001
From: Tj Holowaychuk <tj@vision-media.ca>
Date: Thu, 7 Oct 2010 18:05:19 -0700
Subject: [PATCH] Passing null, 0 when done

---
 src/canvas.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/canvas.cc b/src/canvas.cc
index 86f942b..05c6091 100644
--- a/src/canvas.cc
+++ b/src/canvas.cc
@@ -78,6 +78,10 @@ Canvas::StreamPNG(const Arguments &args) {
   closure_t closure;
   closure.fn = Handle<Function>::Cast(args[0]);
   cairo_surface_write_to_png_stream(canvas->getSurface(), writeToBuffer, &closure);
+  Handle<Value> argv[2];
+  argv[0] = Null();
+  argv[1] = Integer::New(0);
+  closure.fn->Call(Context::GetCurrent()->Global(), 2, argv);
   return Undefined();
 }