Index: mutter-2.29.0/src/core/core.c
===================================================================
--- mutter-2.29.0.orig/src/core/core.c
+++ mutter-2.29.0/src/core/core.c
@@ -526,6 +526,9 @@ meta_core_get_menu_accelerator (MetaMenu
   
   switch (menu_op)
     {
+    case META_MENU_OP_NONE:
+      /* No keybindings needed here */ 
+      break;
     case META_MENU_OP_DELETE:
       name = "close";
       break;
Index: mutter-2.29.0/src/include/common.h
===================================================================
--- mutter-2.29.0.orig/src/include/common.h
+++ mutter-2.29.0/src/include/common.h
@@ -52,6 +52,7 @@ typedef enum
 
 typedef enum
 {
+  META_MENU_OP_NONE        = 0,
   META_MENU_OP_DELETE      = 1 << 0,
   META_MENU_OP_MINIMIZE    = 1 << 1,
   META_MENU_OP_UNMAXIMIZE  = 1 << 2,
Index: mutter-2.29.0/src/core/window.c
===================================================================
--- mutter-2.29.0.orig/src/core/window.c
+++ mutter-2.29.0/src/core/window.c
@@ -7157,7 +7157,7 @@ menu_callback (MetaWindowMenu *menu,
           meta_window_shove_titlebar_onscreen (window);
           break;
 
-        case 0:
+        case META_MENU_OP_NONE:
           /* nothing */
           break;