R devel - Aug 2016 - POSIX <> character comparison is locale dependent

Hi Devs,

In my UTC+1 timezone the following code returns TRUE

     t <- as.POSIXct("1999-12-31 23:50:00", tz = "UTC")
     t > "2000-01-01"
     ## TRUE

For a person in US it would return FALSE.

The reason for this is that timezone of the "t" object is ignored in
base:::Ops.POSIXt.

Could this please be fixed? I am attaching a simple patch in case there is
interest.

Thanks,

 Vitalie



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