Ensure render scale is initialized to 1 on the backend (#2543)

Ryujinx.Graphics.OpenGL/Renderer.cs

@@ -144,6 +144,7 @@ namespace Ryujinx.Graphics.OpenGL
                 GL.Arb.MaxShaderCompilerThreads(Math.Min(Environment.ProcessorCount, 8));
             }
 
+            _pipeline.Initialize();
             _counters.Initialize();
         }