TCL fix in HEAD

The recent TCL patch assumed Tcl_NotifierProcs.initNotifierProc was
added in TCL 8.2:

    #if HAVE_TCL_VERSION(8,2)
        /*
         * Override the functions in the Notifier subsystem.  See comments above.
         */
        {
            Tcl_NotifierProcs notifier;

            notifier.setTimerProc          = pltcl_SetTimer;
            notifier.waitForEventProc      = pltcl_WaitForEvent;
            notifier.createFileHandlerProc = pltcl_CreateFileHandler;
            notifier.deleteFileHandlerProc = pltcl_DeleteFileHandler;
            notifier.initNotifierProc      = pltcl_InitNotifier;

In fact it was added in 8.4 so I have modified the CVS with the
following patch.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://postgres.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +
Index: src/pl/tcl/pltcl.c
===================================================================
RCS file: /cvsroot/pgsql/src/pl/tcl/pltcl.c,v
retrieving revision 1.113
diff -c -c -r1.113 pltcl.c
*** src/pl/tcl/pltcl.c    21 Sep 2007 00:30:49 -0000    1.113
--- src/pl/tcl/pltcl.c    28 Sep 2007 21:02:55 -0000
***************
*** 178,184 ****
   * within Postgres, but we implement all the functions for completeness.
   * We can only fix this with Tcl >= 8.2, when Tcl_SetNotifier() appeared.
   */
! #if HAVE_TCL_VERSION(8,2)

  static ClientData
  pltcl_InitNotifier(void)
--- 178,184 ----
   * within Postgres, but we implement all the functions for completeness.
   * We can only fix this with Tcl >= 8.2, when Tcl_SetNotifier() appeared.
   */
! #if HAVE_TCL_VERSION(8,4)

  static ClientData
  pltcl_InitNotifier(void)
***************
*** 262,268 ****
      Tcl_FindExecutable("");
  #endif

! #if HAVE_TCL_VERSION(8,2)
      /*
       * Override the functions in the Notifier subsystem.  See comments above.
       */
--- 262,268 ----
      Tcl_FindExecutable("");
  #endif

! #if HAVE_TCL_VERSION(8,4)
      /*
       * Override the functions in the Notifier subsystem.  See comments above.
       */