minor code cleanup - replace useless struct timezone argument to

gettimeofday with NULL in a few places, making it consistent with
usage elsewhere.

src/backend/postmaster/postmaster.c

@@ -37,7 +37,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.471 2005/10/20 20:05:44 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.472 2005/10/22 14:27:28 adunstan Exp $
  *
  * NOTES
  *
@@ -1148,9 +1148,8 @@ ServerLoop(void)
 				last_touch_time;
 	struct timeval earlier,
 				later;
-	struct timezone tz;
 
-	gettimeofday(&earlier, &tz);
+	gettimeofday(&earlier, NULL);
 	last_touch_time = time(NULL);
 
 	nSockets = initMasks(&readmask);
@@ -1207,7 +1206,7 @@ ServerLoop(void)
 			 */
 			while (random_seed == 0)
 			{
-				gettimeofday(&later, &tz);
+				gettimeofday(&later, NULL);
 
 				/*
 				 * We are not sure how much precision is in tv_usec, so we

src/backend/utils/adt/nabstime.c

@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/nabstime.c,v 1.145 2005/10/15 02:49:29 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/nabstime.c,v 1.146 2005/10/22 14:27:29 adunstan Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1584,14 +1584,13 @@ Datum
 timeofday(PG_FUNCTION_ARGS)
 {
 	struct timeval tp;
-	struct timezone tpz;
 	char		templ[128];
 	char		buf[128];
 	text	   *result;
 	int			len;
 	pg_time_t	tt;
 
-	gettimeofday(&tp, &tpz);
+	gettimeofday(&tp, NULL);
 	tt = (pg_time_t) tp.tv_sec;
 	pg_strftime(templ, sizeof(templ), "%a %b %d %H:%M:%S.%%06d %Y %Z",
 				pg_localtime(&tt, global_timezone));

src/backend/utils/misc/pg_rusage.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/misc/pg_rusage.c,v 1.2 2005/10/15 02:49:36 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/misc/pg_rusage.c,v 1.3 2005/10/22 14:27:29 adunstan Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -26,10 +26,8 @@
 void
 pg_rusage_init(PGRUsage *ru0)
 {
-	struct timezone tz;
-
 	getrusage(RUSAGE_SELF, &ru0->ru);
-	gettimeofday(&ru0->tv, &tz);
+	gettimeofday(&ru0->tv, NULL);
 }
 
 /*