-D switch to postmaster should override any PGDATA environment variable

that might be hanging about.  Now it does ... amazing nobody noticed
this before ...

src/backend/postmaster/postmaster.c

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.139 2000/04/12 17:15:31 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.140 2000/04/27 02:59:17 tgl Exp $
  *
  * NOTES
  *
@@ -1725,11 +1725,8 @@ BackendStartup(Port *port)
 	putenv(envEntry[1]);
 	sprintf(envEntry[2], "PG_USER=%s", port->user);
 	putenv(envEntry[2]);
-	if (!getenv("PGDATA"))
-	{
-		sprintf(envEntry[3], "PGDATA=%s", DataDir);
-		putenv(envEntry[3]);
-	}
+	sprintf(envEntry[3], "PGDATA=%s", DataDir);
+	putenv(envEntry[3]);
 	sprintf(envEntry[4], "IPC_KEY=%d", ipc_key);
 	putenv(envEntry[4]);
 
@@ -2175,11 +2172,8 @@ SSDataBase(bool startup)
 	putenv(ssEntry[0]);
 	sprintf(ssEntry[1], "POSTID=%d", NextBackendTag);
 	putenv(ssEntry[1]);
-	if (!getenv("PGDATA"))
-	{
-		sprintf(ssEntry[2], "PGDATA=%s", DataDir);
-		putenv(ssEntry[2]);
-	}
+	sprintf(ssEntry[2], "PGDATA=%s", DataDir);
+	putenv(ssEntry[2]);
 	sprintf(ssEntry[3], "IPC_KEY=%d", ipc_key);
 	putenv(ssEntry[3]);