RE: Use allocation macros in the logical replication code

[Hayato Kuroda (Fujitsu)]

Dear Peter,

Thanks for the patch. I have one comment for the patch:
```
@@ -836,8 +836,9 @@ SnapBuildAddCommittedTxn(SnapBuild *builder, TransactionId 
xid)
                elog(DEBUG1, "increasing space for committed transactions to 
%u",
                         (uint32) builder->committed.xcnt_space);
 
-               builder->committed.xip = repalloc(builder->committed.xip,
-                                                                               
  builder->committed.xcnt_space * sizeof(TransactionId));
+               builder->committed.xip = repalloc_array(builder->committed.xip,
+                                                       TransactionId,
+                                                       
builder->committed.xcnt_space);
```

Number of tabs seems not to enough here. Other than that LGTM.

Best regards,
Hayato Kuroda
FUJITSU LIMITED