Qt: Fix compilation under clang-9

Fixes #23.

src/core/gpu_hw.cpp

@@ -274,7 +274,7 @@ void GPU_HW::IncludeVRAMDityRectangle(const Common::Rectangle<u32>& rect)
   // shadow texture is updated
   if (!m_draw_mode.IsTexturePageChanged() &&
       (m_draw_mode.GetTexturePageRectangle().Intersects(rect) ||
-       m_draw_mode.IsUsingPalette() && m_draw_mode.GetTexturePaletteRectangle().Intersects(rect)))
+       (m_draw_mode.IsUsingPalette() && m_draw_mode.GetTexturePaletteRectangle().Intersects(rect))))
   {
     m_draw_mode.SetTexturePageChanged();
   }

src/duckstation-qt/qthostinterface.cpp

@@ -319,8 +319,11 @@ void QtHostInterface::updateControllerInputMap()
       continue;
 
     const auto button_names = Controller::GetButtonNames(ctype);
-    for (const auto& [button_name, button_code] : button_names)
+    for (const auto& it : button_names)
     {
+      const std::string& button_name = it.first;
+      const s32 button_code = it.second;
+
       QVariant var = m_qsettings.value(
         QStringLiteral("Controller%1/Button%2").arg(controller_index + 1).arg(QString::fromStdString(button_name)));
       if (!var.isValid())

src/duckstation-sdl/d3d11_host_display.h

@@ -44,7 +44,7 @@ private:
   bool CreateSwapChainRTV();
   bool CreateImGuiContext();
 
-  void Render();
+  void Render() override;
   void RenderDisplay();
 
   SDL_Window* m_window = nullptr;

src/duckstation-sdl/opengl_host_display.h

@@ -39,7 +39,7 @@ private:
   bool CreateImGuiContext();
   bool CreateGLResources();
 
-  void Render();
+  void Render() override;
   void RenderDisplay();
 
   SDL_Window* m_window = nullptr;