[R] pdf output incompatible with latest ghostscript

[ivo welch]

I just upgraded to the latest ghostscript, AFPL 8.54.  When I run the
R output through gs, I get

AFPL Ghostscript 8.54: Set UseCUEColor for UseDeviceIndependentColor
to work properly.

followed by a segfault.  the resulting ghostscript file is incomplete
(no %%EOF).  probably a ghostscript bug, but caused by R output.

regards,

/iaw