From 3c4bf5f4e3f296b4f147602817b1aa17b419682e Mon Sep 17 00:00:00 2001
From: =?utf8?q?Sebastian=20Dr=C3=B6ge?= <sebastian.droege@collabora.co.uk>
Date: Fri, 1 May 2009 17:05:49 +0200
Subject: [PATCH] Handle NULL GstIterator* correctly

---
 gstreamer-sharp/Element.custom | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/gstreamer-sharp/Element.custom b/gstreamer-sharp/Element.custom
index 762b92a..a7d18c9 100644
--- a/gstreamer-sharp/Element.custom
+++ b/gstreamer-sharp/Element.custom
@@ -54,6 +54,9 @@ private class PadEnumerable : IEnumerable {
       IntPtr raw_ret;
       bool retry = false;
 
+      if (iterator == IntPtr.Zero)
+        return false;
+
       do {
         int ret = gst_iterator_next (iterator, out raw_ret);
         switch (ret) {
@@ -82,7 +85,8 @@ private class PadEnumerable : IEnumerable {
 
     public void Reset () {
       seen.Clear ();
-      gst_iterator_resync (iterator);
+      if (iterator != IntPtr.Zero)
+        gst_iterator_resync (iterator);
     }
 
     public PadEnumerator (IntPtr iterator) {
@@ -103,7 +107,8 @@ private class PadEnumerable : IEnumerable {
   }
 
   ~PadEnumerable () {
-    gst_iterator_free (iterator);
+    if (iterator != IntPtr.Zero)
+      gst_iterator_free (iterator);
   }
 }
 
-- 
2.7.4