Document common argus_camera error from X forwarding

Signed-off-by: Tushar Pankaj <tushar.s.pankaj@gmail.com>
Change-Id: I7bc3ef6af61ded0183bcf4d784da890944970108
diff --git a/frc971/orin/argus_camera.cc b/frc971/orin/argus_camera.cc
index 0bff39b..016bd81 100644
--- a/frc971/orin/argus_camera.cc
+++ b/frc971/orin/argus_camera.cc
@@ -276,6 +276,8 @@
       CHECK(ret == 0) << ": NvBufSurfaceFromFd failed";
 
       ret = NvBufSurfaceMapEglImage(surf_[i], 0);
+      // This check typically fails from having X forwarding enabled.
+      // Always call argus_camera without X forwarding.
       CHECK(ret == 0) << ": NvBufSurfaceMapEglImage failed";
 
       egl_images_[i] = surf_[i]->surfaceList[0].mappedAddr.eglImage;