Throw a warning rather than an error on invalid character from UTF8 to

Latin1, like we do for other Latin encodings.

src/backend/utils/mb/conversion_procs/utf8_and_iso8859_1/utf8_and_iso8859_1.c

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859_1/utf8_and_iso8859_1.c,v 1.13 2005/12/25 02:14:18 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/mb/conversion_procs/utf8_and_iso8859_1/utf8_and_iso8859_1.c,v 1.14 2006/02/12 21:15:19 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -84,8 +84,10 @@ utf8_to_iso8859_1(PG_FUNCTION_ARGS)
 			len -= 2;
 		}
 		else if ((c & 0xe0) == 0xe0)
-			elog(ERROR, "could not convert UTF8 character 0x%04x to ISO8859-1",
-				 c);
+			ereport(WARNING,
+					(errcode(ERRCODE_UNTRANSLATABLE_CHARACTER),
+					 errmsg("ignoring unconvertible UTF-8 character 0x%04x",
+							c)));
 		else
 		{
 			*dest++ = c;