yuzu/game_list: Silence -Wswitch and -Wunused-variable

src/yuzu/game_list.cpp

@@ -172,9 +172,7 @@ void GameList::onTextChanged(const QString& new_text) {
     const int folder_count = tree_view->model()->rowCount();
     QString edit_filter_text = new_text.toLower();
     QStandardItem* folder;
-    QStandardItem* child;
     int children_total = 0;
-    QModelIndex root_index = item_model->invisibleRootItem()->index();
 
     // If the searchfield is empty every item is visible
     // Otherwise the filter gets applied
@@ -272,6 +270,8 @@ void GameList::onUpdateThemedIcons() {
                     .scaled(icon_size, icon_size, Qt::IgnoreAspectRatio, Qt::SmoothTransformation),
                 Qt::DecorationRole);
             break;
+        default:
+            break;
         }
     }
 }
@@ -392,6 +392,8 @@ void GameList::ValidateEntry(const QModelIndex& item) {
     case GameListItemType::AddDir:
         emit AddDirectory();
         break;
+    default:
+        break;
     }
 }
 
@@ -462,6 +464,8 @@ void GameList::PopupContextMenu(const QPoint& menu_location) {
     case GameListItemType::SysNandDir:
         AddPermDirPopup(context_menu, selected);
         break;
+    default:
+        break;
     }
     context_menu.exec(tree_view->viewport()->mapToGlobal(menu_location));
 }

src/yuzu/game_list_p.h

@@ -247,7 +247,7 @@ public:
                 Qt::DecorationRole);
             setData(QObject::tr("System Titles"), Qt::DisplayRole);
             break;
-        case GameListItemType::CustomDir:
+        case GameListItemType::CustomDir: {
             const QString icon_name = QFileInfo::exists(game_dir->path)
                                           ? QStringLiteral("folder")
                                           : QStringLiteral("bad_folder");
@@ -256,8 +256,11 @@ public:
                     Qt::DecorationRole);
             setData(game_dir->path, Qt::DisplayRole);
             break;
-        };
-    };
+        }
+        default:
+            break;
+        }
+    }
 
     int type() const override {
         return static_cast<int>(dir_type);