minor fixes

src/kiwano/platform/Window.h

@@ -55,6 +55,8 @@ struct Resolution
     uint32_t height = 0;        ///< 分辨率高度
     uint32_t refresh_rate = 0;  ///< 刷新率
 
+    Resolution() = default;
+
     Resolution(uint32_t width, uint32_t height, uint32_t refresh_rate)
         : width(width)
         , height(height)