Fix brace warning

src/device/novell_cardkey.c

@@ -102,7 +102,7 @@ static const device_config_t keycard_config[] = {
         .default_int = 0,
         .file_filter = "",
         .spinner = { 0 },
-        .selection = { 0 }
+        .selection = { { 0 } }
     },
     { .name = "", .description = "", .type = CONFIG_END }
   // clang-format on
@@ -120,4 +120,4 @@ const device_t novell_keycard_device = {
     .speed_changed = NULL,
     .force_redraw  = NULL,
     .config        = keycard_config
-};
+};