Cleanup

tui_main.c

@@ -1708,7 +1708,8 @@ typedef enum {
 void ged_input_cmd(Ged *a, Ged_input_cmd ev) {
   switch (ev) {
   case Ged_input_cmd_undo:
-    if (undo_history_count(&a->undo_hist) > 0) {
+    if (undo_history_count(&a->undo_hist) == 0)
+      break;
     if (a->is_playing) {
       undo_history_apply(&a->undo_hist, &a->field, &a->tick_num);
     } else {
@@ -1719,7 +1720,6 @@ void ged_input_cmd(Ged *a, Ged_input_cmd ev) {
     ged_make_cursor_visible(a);
     a->needs_remarking = true;
     a->is_draw_dirty = true;
-    }
     break;
   case Ged_input_cmd_toggle_append_mode:
     if (a->input_mode == Ged_input_mode_append) {