emu_window: Pass OnMinimalClientAreaChangeRequest argument by copy

There's no performance improvement in passing an unsigned pair by
reference.

src/core/frontend/emu_window.h

@@ -169,8 +169,7 @@ private:
      * For the request to be honored, EmuWindow implementations will usually reimplement this
      * function.
      */
-    virtual void OnMinimalClientAreaChangeRequest(
-        const std::pair<unsigned, unsigned>& minimal_size) {
+    virtual void OnMinimalClientAreaChangeRequest(std::pair<unsigned, unsigned>) {
         // By default, ignore this request and do nothing.
     }
 

src/yuzu/bootmanager.cpp

@@ -440,8 +440,7 @@ void GRenderWindow::CaptureScreenshot(u16 res_scale, const QString& screenshot_p
                                layout);
 }
 
-void GRenderWindow::OnMinimalClientAreaChangeRequest(
-    const std::pair<unsigned, unsigned>& minimal_size) {
+void GRenderWindow::OnMinimalClientAreaChangeRequest(std::pair<unsigned, unsigned> minimal_size) {
     setMinimumSize(minimal_size.first, minimal_size.second);
 }
 

src/yuzu/bootmanager.h

@@ -162,8 +162,7 @@ private:
     void TouchUpdateEvent(const QTouchEvent* event);
     void TouchEndEvent();
 
-    void OnMinimalClientAreaChangeRequest(
-        const std::pair<unsigned, unsigned>& minimal_size) override;
+    void OnMinimalClientAreaChangeRequest(std::pair<unsigned, unsigned> minimal_size) override;
 
     QWidget* container = nullptr;
     GGLWidgetInternal* child = nullptr;

src/yuzu_cmd/emu_window/emu_window_sdl2.cpp

@@ -172,7 +172,6 @@ void EmuWindow_SDL2::PollEvents() {
     }
 }
 
-void EmuWindow_SDL2::OnMinimalClientAreaChangeRequest(
-    const std::pair<unsigned, unsigned>& minimal_size) {
+void EmuWindow_SDL2::OnMinimalClientAreaChangeRequest(std::pair<unsigned, unsigned> minimal_size) {
     SDL_SetWindowMinimumSize(render_window, minimal_size.first, minimal_size.second);
 }

src/yuzu_cmd/emu_window/emu_window_sdl2.h

@@ -50,8 +50,7 @@ protected:
     void Fullscreen();
 
     /// Called when a configuration change affects the minimal size of the window
-    void OnMinimalClientAreaChangeRequest(
-        const std::pair<unsigned, unsigned>& minimal_size) override;
+    void OnMinimalClientAreaChangeRequest(std::pair<unsigned, unsigned> minimal_size) override;
 
     /// Is the window still open?
     bool is_open = true;