[libgnome-volume-control/do-not-deref-null-pointer] gvc-mixer-ui-device: Do not deref NULL pointer

[Kai Lüke <kailueke src gnome org>]

commit 1949be72667dec4220de5cfbd4e3066d32a9a63a
Author: Kai Lüke <kailueke riseup net>
Date:   Mon Jan 4 22:03:16 2021 +0100

    gvc-mixer-ui-device: Do not deref NULL pointer

 gvc-mixer-ui-device.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/gvc-mixer-ui-device.c b/gvc-mixer-ui-device.c
index f7dd33e..a2bdc45 100644
--- a/gvc-mixer-ui-device.c
+++ b/gvc-mixer-ui-device.c
@@ -557,6 +557,11 @@ gvc_mixer_ui_device_get_active_profile (GvcMixerUIDevice* device)
         }
 
         profile = gvc_mixer_card_get_profile (device->priv->card);
+        if (profile == NULL) {
+                g_debug ("Device has no assigned profile");
+                return NULL;
+        }
+
         return gvc_mixer_ui_device_get_matching_profile (device, profile->profile);
 }