From 005c628352186a4f2d184a14952df336c469d0a4 Mon Sep 17 00:00:00 2001
From: Andreas Lind <andreas@one.com>
Date: Thu, 23 Oct 2014 08:32:19 +0200
Subject: [PATCH] Do not call g_object_unref when imageType comes out as
 UNKNOWN.

Avoids "(sharp:23220): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed" dumped to the console when an unsupported or invalid image is loaded.
---
 src/metadata.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/metadata.cc b/src/metadata.cc
index 37ec3091..87ece152 100755
--- a/src/metadata.cc
+++ b/src/metadata.cc
@@ -76,7 +76,9 @@ class MetadataWorker : public NanAsyncWorker {
       }
     }
     // Clean up
-    g_object_unref(image);
+    if (imageType != UNKNOWN) {
+      g_object_unref(image);
+    }
     vips_error_clear();
     vips_thread_shutdown();
   }