From 9f1fbd36495b7f90d15f7d2dc39fb6e435017573 Mon Sep 17 00:00:00 2001
From: Philippe Normand <philn@igalia.com>
Date: Sun, 5 Jan 2020 16:20:18 +0000
Subject: [PATCH] decklink: Fix crash when probing without driver

If there is no decklink hardware/driver, the devices list is empty (NULL), so
this needs to be checked before iterating over the list.
---
 sys/decklink/gstdecklink.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/decklink/gstdecklink.cpp b/sys/decklink/gstdecklink.cpp
index 4978ee40fa..82fc8005da 100644
--- a/sys/decklink/gstdecklink.cpp
+++ b/sys/decklink/gstdecklink.cpp
@@ -1586,6 +1586,10 @@ gst_decklink_get_devices (void)
 
   g_once (&devices_once, init_devices, NULL);
 
+  if (!devices) {
+    return NULL;
+  }
+
   for (i = 0; i < devices->len; i++) {
     Device *device = (Device *) g_ptr_array_index (devices, i);