Don't save the frame buffer into savestates if the core is NES since it saves this data itself anyway

BizHawk.MultiClient/MainForm.cs

@@ -1769,10 +1769,13 @@ namespace BizHawk.MultiClient
 			Global.Emulator.SaveStateText(writer);
 			HandleMovieSaveState(writer);
 			if (Global.Config.SaveScreenshotWithStates)
+			{
+				if (!(Global.Emulator is NES)) //NES saves the video buffer on its own so it does not need to do this
 				{
 					writer.Write("Framebuffer ");
 					Global.Emulator.VideoProvider.GetVideoBuffer().SaveAsHex(writer);
 				}
+			}
 
 			writer.Close();
 			Global.RenderPanel.AddMessage("Saved state: " + name);