making window manager not break when attempting to shuffle single window

1 files changed, 4 insertions, 0 deletions

diff --git a/src/kernel/window.c b/src/kernel/window.c
index ac03fc9..80780d4 100644
--- a/src/kernel/window.c
+++ b/src/kernel/window.c
@@ -265,6 +265,8 @@ void on_action(struct window_action packet) {
           struct window *old_top, *old_bottom;
           switch (i) {
           case WM_SHUFFLE_UP:
+            if (!top_window->below)
+              break;
             old_top = top_window;
             old_bottom = bottom_window;
             top_window = old_top->below;
@@ -276,6 +278,8 @@ void on_action(struct window_action packet) {
             paint_and_above(bottom_window->above);
             break;
           case WM_SHUFFLE_DOWN:
+            if (!top_window->below)
+              break;
             old_top = top_window;
             old_bottom = bottom_window;
             bottom_window = old_bottom->above;