Fix function name in comment.
Author: Masahiro Ikeda
Discussion:
@@ -82,7 +82,7 @@ RelfilenodeMapInvalidateCallback(Datum arg, Oid relid)
}
/*
- * RelfilenodeMapInvalidateCallback
+ * InitializeRelfilenodeMap
* Initialize cache, either on first use or after a reset.
*/
static void
