Avoid C99-ism in pre-v12 branches.

Per buildfarm (I need to figure out why my own compiler did not
whine about this).

diff --git a/src/backend/catalog/indexing.c b/src/backend/catalog/indexing.c
index 674e6a8321ff8e68b52c3742f665c403263bea82..2f0b02507959b39b245f2a9492727efb7aa71aaf 100644 (file)
--- a/src/backend/catalog/indexing.c
+++ b/src/backend/catalog/indexing.c
@@ -187,8 +187,9 @@ CatalogTupleCheckConstraints(Relation heapRel, HeapTuple tup)
    {
        TupleDesc   tupdesc = RelationGetDescr(heapRel);
        bits8      *bp = tup->t_data->t_bits;
+       int         attnum;
 
-       for (int attnum = 0; attnum < tupdesc->natts; attnum++)
+       for (attnum = 0; attnum < tupdesc->natts; attnum++)
        {
            Form_pg_attribute thisatt = TupleDescAttr(tupdesc, attnum);