ipc: handle unnamed xkb_active_layout_name

If the active xkb_layout does not have a name, use `NULL` instead of
`json_object_new_string(NULL)`. This also makes it so swaymsg will pretty
print this as `(unnamed)`.

1 files changed, 1 insertions, 1 deletions

diff --git a/sway/ipc-json.c b/sway/ipc-json.c
index e1098942..23016dbd 100644
--- a/sway/ipc-json.c
+++ b/sway/ipc-json.c
@@ -597,7 +597,7 @@ json_object *ipc_json_describe_input(struct sway_input_device *device) {
                                 const char *layout =
                                         xkb_keymap_layout_get_name(keymap, layout_idx);
                                 json_object_object_add(object, "xkb_active_layout_name",
-                                                json_object_new_string(layout));
+                                                layout ? json_object_new_string(layout) : NULL);
                                 break;
                         }
                 }