[gthumb] gstreamer utils: unref the sample only if the pixbuf was not created

[Paolo Bacchilega <paobac src gnome org>]

commit 0641e75e8623bf7bc7e6f510a3c9549f4469f841
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Fri May 21 08:08:42 2021 +0200

    gstreamer utils: unref the sample only if the pixbuf was not created

 extensions/gstreamer_utils/gstreamer-utils.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/extensions/gstreamer_utils/gstreamer-utils.c b/extensions/gstreamer_utils/gstreamer-utils.c
index 83812100..bcc27ccd 100644
--- a/extensions/gstreamer_utils/gstreamer-utils.c
+++ b/extensions/gstreamer_utils/gstreamer-utils.c
@@ -797,10 +797,11 @@ _gst_playbin_get_current_frame (GstElement          *playbin,
                gst_memory_unref (memory);
        }
 
-       if (data->pixbuf == NULL)
+       if (data->pixbuf == NULL) {
+               gst_sample_unref (sample);
                g_warning ("Could not take screenshot: %s", "could not create pixbuf");
+       }
 
-       gst_sample_unref (sample);
        screenshot_data_finalize (data);
 
        return TRUE;