Cleanup: break before the default case in switch statements

While missing the break before a default that only breaks isn't
an error, it means adding new cases needs to remember to add the
break for an existing case, changing the default case will also
result in an unintended fall-through.

Also avoid `default:;` and add an explicit break.

7 files changed, 12 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/attribute.cc b/source/blender/blenkernel/intern/attribute.cc
index 394f9e738d4..0f7fabcff9b 100644
--- a/source/blender/blenkernel/intern/attribute.cc
+++ b/source/blender/blenkernel/intern/attribute.cc
@@ -421,6 +421,7 @@ int BKE_id_attribute_data_length(ID *id, CustomDataLayer *layer)
       if (mesh->edit_mesh != nullptr) {
         return 0;
       }
+      break;
     }
     default:
       break;
diff --git a/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc b/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc
index 96ab9388023..9ccd7ed447b 100644
--- a/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc
+++ b/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc
@@ -62,6 +62,7 @@ void RuntimeBackup::init_from_id(ID *id)
       break;
     case ID_GD:
       gpencil_backup.init_from_gpencil(reinterpret_cast<bGPdata *>(id));
+      break;
     default:
       break;
   }
@@ -104,6 +105,7 @@ void RuntimeBackup::restore_to_id(ID *id)
       break;
     case ID_GD:
       gpencil_backup.restore_to_gpencil(reinterpret_cast<bGPdata *>(id));
+      break;
     default:
       break;
   }
diff --git a/source/blender/editors/interface/interface.cc b/source/blender/editors/interface/interface.cc
index c076845af3c..933724c9294 100644
--- a/source/blender/editors/interface/interface.cc
+++ b/source/blender/editors/interface/interface.cc
@@ -6754,10 +6754,11 @@ void UI_but_extra_icon_string_info_get(struct bContext *C, uiButExtraOpIcon *ext
         if (ui_but_extra_icon_event_operator_string(C, extra_icon, buf, sizeof(buf))) {
           tmp = BLI_strdup(buf);
         }
+        break;
       }
+      default:
         /* Other types not supported. The caller should expect that outcome, no need to message or
          * assert here. */
-      default:
         break;
     }
 
diff --git a/source/blender/editors/interface/interface_template_search_menu.cc b/source/blender/editors/interface/interface_template_search_menu.cc
index c3021028b97..c777b7834f2 100644
--- a/source/blender/editors/interface/interface_template_search_menu.cc
+++ b/source/blender/editors/interface/interface_template_search_menu.cc
@@ -918,6 +918,7 @@ static void menu_search_arg_free_fn(void *data_v)
           WM_operator_properties_free(item->op.opptr);
           MEM_freeN(item->op.opptr);
         }
+        break;
       }
       case MenuSearch_Item::Type::RNA: {
         break;
diff --git a/source/blender/editors/object/object_vgroup.cc b/source/blender/editors/object/object_vgroup.cc
index 0e0f5bd94cc..7a61adfb95c 100644
--- a/source/blender/editors/object/object_vgroup.cc
+++ b/source/blender/editors/object/object_vgroup.cc
@@ -1773,7 +1773,8 @@ static void vgroup_lock_all(Object *ob, int action, int mask)
             continue;
           }
           break;
-        default:;
+        default:
+          break;
       }
 
       if (dg->flag & DG_LOCK_WEIGHT) {
@@ -1795,7 +1796,8 @@ static void vgroup_lock_all(Object *ob, int action, int mask)
           continue;
         }
         break;
-      default:;
+      default:
+        break;
     }
 
     switch (action) {
diff --git a/source/blender/modifiers/intern/MOD_nodes.cc b/source/blender/modifiers/intern/MOD_nodes.cc
index c571a4821b4..56967e62d8a 100644
--- a/source/blender/modifiers/intern/MOD_nodes.cc
+++ b/source/blender/modifiers/intern/MOD_nodes.cc
@@ -297,6 +297,7 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
       case ID_IM:
       case ID_TE: {
         DEG_add_generic_id_relation(ctx->node, id, "Nodes Modifier");
+        break;
       }
       default: {
         /* Purposefully don't add relations for materials. While there are material sockets,
diff --git a/source/blender/windowmanager/intern/wm_event_system.cc b/source/blender/windowmanager/intern/wm_event_system.cc
index 2bba0ac802d..3054708fbdb 100644
--- a/source/blender/windowmanager/intern/wm_event_system.cc
+++ b/source/blender/windowmanager/intern/wm_event_system.cc
@@ -1591,6 +1591,7 @@ static int wm_operator_call_internal(bContext *C,
         case WM_OP_EXEC_AREA:
         case WM_OP_EXEC_SCREEN:
           event = nullptr;
+          break;
         default:
           break;
       }