[gtk/matthiasc/for-master] inspector: Avoid a critical

[Matthias Clasen <matthiasc src gnome org>]

commit d7060025e01b4ffe2c01bad8617075b2f32bd1a9
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jan 17 10:55:53 2021 -0500

    inspector: Avoid a critical
    
    Avoid a critical when closing the inspector with the
    recorder page open.

 gtk/inspector/recorder.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gtk/inspector/recorder.c b/gtk/inspector/recorder.c
index 5b6452f340..c8042ca580 100644
--- a/gtk/inspector/recorder.c
+++ b/gtk/inspector/recorder.c
@@ -404,6 +404,9 @@ recordings_list_row_selected (GtkListBox           *box,
 {
   GtkInspectorRecording *recording;
 
+  if (recorder->recordings == NULL)
+    return;
+
   if (row)
     recording = g_list_model_get_item (recorder->recordings, gtk_list_box_row_get_index (row));
   else