notice on explicit primary key or index name

Hi,

when primary key or unique index is created using explicit name, strange
notice will say that implicit name was generated. But it didnt.

# select version();
PostgreSQL 8.4.1 on i686-pc-linux-gnu, compiled by GCC
i686-pc-linux-gnu-gcc (Gentoo 4.3.4 p1.0, pie-10.1.5) 4.3.4, 32-bit

# create table dummy(x integer, y integer);
CREATE TABLE

# alter table dummy add constraint pk_dummy_x primary key (x);
NOTICE:  ALTER TABLE / ADD PRIMARY KEY will create implicit index
"pk_dummy_x" for table "dummy"
ALTER TABLE

Maybe problem in src/backend/commands/indexcmds.c. Untested patch attached.

Regards, Tomas Psika
*** src/backend/commands/indexcmds.c.bak    2009-09-19 11:56:57.000000000 +0200
--- src/backend/commands/indexcmds.c    2009-09-19 12:09:17.000000000 +0200
***************
*** 127,132 ****
--- 127,133 ----
      Datum        reloptions;
      int16       *coloptions;
      IndexInfo  *indexInfo;
+     bool         implicitNameUsed = false;
      int            numberOfAttributes;
      VirtualTransactionId *old_lockholders;
      VirtualTransactionId *old_snapshots;
***************
*** 242,247 ****
--- 243,250 ----
       */
      if (indexRelationName == NULL)
      {
+         implicitNameUsed = true;
+
          if (primary)
              indexRelationName = ChooseRelationName(RelationGetRelationName(rel),
                                                     NULL,
***************
*** 430,436 ****
       * Report index creation if appropriate (delay this till after most of the
       * error checks)
       */
!     if (isconstraint && !quiet)
          ereport(NOTICE,
            (errmsg("%s %s will create implicit index \"%s\" for table \"%s\"",
                    is_alter_table ? "ALTER TABLE / ADD" : "CREATE TABLE /",
--- 433,439 ----
       * Report index creation if appropriate (delay this till after most of the
       * error checks)
       */
!     if (isconstraint && implicitNameUsed && !quiet)
          ereport(NOTICE,
            (errmsg("%s %s will create implicit index \"%s\" for table \"%s\"",
                    is_alter_table ? "ALTER TABLE / ADD" : "CREATE TABLE /",