Fix VIC out of bounds copy (#3386)

* Fix VIC out of bounds copy

* Update the assert

Ryujinx.Graphics.Vic/Rectangle.cs

@@ -0,0 +1,18 @@
+namespace Ryujinx.Graphics.Vic
+{
+    struct Rectangle
+    {
+        public readonly int X;
+        public readonly int Y;
+        public readonly int Width;
+        public readonly int Height;
+
+        public Rectangle(int x, int y, int width, int height)
+        {
+            X = x;
+            Y = y;
+            Width = width;
+            Height = height;
+        }
+    }
+}