[gnome-boxes/fix-crash-when-input-source-not-available: 1/2] unattended-installer: check null keyboard

[Felipe Borges <felipeborges src gnome org>]

commit 2dc6dd875a9abbfdf74659dd30e302b9a612ce2d
Author: Isaque Galdino <igaldino gmail com>
Date:   Wed Nov 27 17:31:32 2019 -0300

    unattended-installer: check null keyboard

 src/unattended-installer.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/unattended-installer.vala b/src/unattended-installer.vala
index 98003f3e..2b5920b5 100644
--- a/src/unattended-installer.vala
+++ b/src/unattended-installer.vala
@@ -667,7 +667,7 @@ private string get_preferred_keyboard (string lang) {
                 kbd_layout = sources.get_child_value (0).get_child_value (1).get_string ();
             }
 
-            if (datamap.reverse_lookup (kbd_layout) != null) {
+            if (kbd_layout != null && datamap.reverse_lookup (kbd_layout) != null) {
                 return kbd_layout;
             }
         } catch (GLib.Error error) {