Minor comment fixes

TransactionId*Is*InProgress is misspelled in a couple of comments in
twophase.c..

--
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com
Index: src/backend/access/transam/twophase.c
===================================================================
RCS file: /home/hlinnaka/pgcvsrepository/pgsql/src/backend/access/transam/twophase.c,v
retrieving revision 1.35
diff -c -r1.35 twophase.c
*** src/backend/access/transam/twophase.c    8 Sep 2007 20:31:14 -0000    1.35
--- src/backend/access/transam/twophase.c    21 Sep 2007 15:25:37 -0000
***************
*** 353,359 ****
      LWLockRelease(TwoPhaseStateLock);

      /*
!      * Put it into the global ProcArray so TransactionIdInProgress considers
       * the XID as still running.
       */
      ProcArrayAdd(&gxact->proc);
--- 353,359 ----
      LWLockRelease(TwoPhaseStateLock);

      /*
!      * Put it into the global ProcArray so TransactionIdIsInProgress considers
       * the XID as still running.
       */
      ProcArrayAdd(&gxact->proc);
***************
*** 979,985 ****
       * NB: a side effect of this is to make a dummy ProcArray entry for the
       * prepared XID.  This must happen before we clear the XID from MyProc,
       * else there is a window where the XID is not running according to
!      * TransactionIdInProgress, and onlookers would be entitled to assume the
       * xact crashed.  Instead we have a window where the same XID appears
       * twice in ProcArray, which is OK.
       */
--- 979,985 ----
       * NB: a side effect of this is to make a dummy ProcArray entry for the
       * prepared XID.  This must happen before we clear the XID from MyProc,
       * else there is a window where the XID is not running according to
!      * TransactionIdIsInProgress, and onlookers would be entitled to assume the
       * xact crashed.  Instead we have a window where the same XID appears
       * twice in ProcArray, which is OK.
       */