elog(NOTICE) during COPY incorrectly reset lineno to 0, causing any

subsequent elogs() in the same COPY operation to display the wrong
line number.  Fix is to clear lineno only when elog level is such
that we will not return to caller.

src/backend/utils/error/elog.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/error/elog.c,v 1.56 2000/04/12 17:15:55 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/error/elog.c,v 1.57 2000/04/15 19:13:08 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -197,7 +197,8 @@ elog(int lev, const char *fmt,...)
 	if (lineno)
 	{
 		sprintf(bp, "copy: line %d, ", lineno);
-		bp = fmt_buf + strlen(fmt_buf);
+		bp += strlen(bp);
+		if (lev == ERROR || lev >= FATAL)
 			lineno = 0;
 	}