CVSROOT:        /cvs
Module name:    src
Changes by:     v...@cvs.openbsd.org    2018/06/26 08:43:01

Modified files:
        sys/kern       : kern_descrip.c 

Log message:
Remove a duplicate fd_used() call. The new file descriptor passed
to dupfdopen() has already been registered with fd_used() in fdalloc().

The duplicate call distorted the number of open file descriptors
returned by getdtablecount(2) if a file was opened via /dev/fd/.

While there, assert that the file instance should already be in the
file list.

OK mpi@

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