Fix old style function definitions

Signed-off-by: Elyes Haouas <ehaouas@noos.fr>

sway/commands/split.c

@@ -32,7 +32,7 @@ static struct cmd_results *do_split(int layout) {
 	return cmd_results_new(CMD_SUCCESS, NULL);
 }
 
-static struct cmd_results *do_unsplit() {
+static struct cmd_results *do_unsplit(void) {
 	struct sway_container *con = config->handler_context.container;
 	struct sway_workspace *ws = config->handler_context.workspace;
 

sway/desktop/launcher.c

@@ -228,7 +228,7 @@ struct launcher_ctx *launcher_ctx_create(struct wlr_xdg_activation_token_v1 *tok
 }
 
 // Creates a context with a new token for the internal launcher
-struct launcher_ctx *launcher_ctx_create_internal() {
+struct launcher_ctx *launcher_ctx_create_internal(void) {
 	struct sway_seat *seat = input_manager_current_seat();
 	struct sway_workspace *ws = seat_get_focused_workspace(seat);
 	if (!ws) {