o Move initialization of ump from mp to the top of the function so that   it is defined whenm used in ufs_extattr_uepm_destroy(), fixing a panic   due to a NULL pointer dereference.
o Move initialization of ump from mp to the top of the function so that
  it is defined whenm used in ufs_extattr_uepm_destroy(), fixing a panic
  due to a NULL pointer dereference.

Submitted by:	Wesley Morgan <morganw@chemicals.tacorp.com>

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