- Remove redundant timecounter masking from counter_get_timecount(). - Zero the timecounter when allocation so we don't need to initialize unused   members and remove a now redundant NULL assignment.
- Remove redundant timecounter masking from counter_get_timecount().
- Zero the timecounter when allocation so we don't need to initialize unused
  members and remove a now redundant NULL assignment.

Submitted by:	jkim

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