From c3875a236b139c993bea22ef2c7b3b64886e84c9 Mon Sep 17 00:00:00 2001
From: Edward Hervey <edward@centricular.com>
Date: Thu, 30 Nov 2017 10:46:44 +0100
Subject: [PATCH] alsamidisrc: Don't assume a clock has been set

Can happen in testing scenarios for example
---
 ext/alsa/gstalsamidisrc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ext/alsa/gstalsamidisrc.c b/ext/alsa/gstalsamidisrc.c
index f07ed77afa..6d1582ed4f 100644
--- a/ext/alsa/gstalsamidisrc.c
+++ b/ext/alsa/gstalsamidisrc.c
@@ -625,6 +625,10 @@ gst_alsa_midi_src_state_changed (GstElement * element, GstState oldstate,
     snd_seq_queue_status_t *status;
 
     clock = gst_element_get_clock (element);
+    if (clock == NULL) {
+      GST_WARNING_OBJECT (element, "No clock present");
+      return;
+    }
     gst_time = gst_clock_get_time (clock);
     gst_object_unref (clock);
     base_time = gst_element_get_base_time (element);