hle/result: Declare copy/move constructor/assignment as noexcept

While we're at it, we can also declare these copy/move constructor/assignment as noexcept.

src/core/hle/result.h

@@ -206,7 +206,7 @@ public:
         return result;
     }
 
-    ResultVal(const ResultVal& o) : result_code(o.result_code) {
+    ResultVal(const ResultVal& o) noexcept : result_code(o.result_code) {
         if (!o.empty()) {
             new (&object) T(o.object);
         }
@@ -224,7 +224,7 @@ public:
         }
     }
 
-    ResultVal& operator=(const ResultVal& o) {
+    ResultVal& operator=(const ResultVal& o) noexcept {
         if (this == &o) {
             return *this;
         }
@@ -244,6 +244,26 @@ public:
         return *this;
     }
 
+    ResultVal& operator=(ResultVal&& o) noexcept {
+        if (this == &o) {
+            return *this;
+        }
+        if (!empty()) {
+            if (!o.empty()) {
+                object = std::move(o.object);
+            } else {
+                object.~T();
+            }
+        } else {
+            if (!o.empty()) {
+                new (&object) T(std::move(o.object));
+            }
+        }
+        result_code = o.result_code;
+
+        return *this;
+    }
+
     /**
      * Replaces the current result with a new constructed result value in-place. The code must not
      * be an error code.

src/yuzu/configuration/configure_dialog.cpp

@@ -81,8 +81,11 @@ ConfigureDialog::ConfigureDialog(QWidget* parent, HotkeyRegistry& registry,
     SetConfiguration();
     PopulateSelectionList();
 
-    connect(ui->tabWidget, &QTabWidget::currentChanged, this,
-            [this]() { debug_tab_tab->SetCurrentIndex(0); });
+    connect(ui->tabWidget, &QTabWidget::currentChanged, this, [this](int index) {
+        if (index != -1) {
+            debug_tab_tab->SetCurrentIndex(0);
+        }
+    });
     connect(ui_tab.get(), &ConfigureUi::LanguageChanged, this, &ConfigureDialog::OnLanguageChanged);
     connect(ui->selectorList, &QListWidget::itemSelectionChanged, this,
             &ConfigureDialog::UpdateVisibleTabs);