havior of <TT
CLASS="LITERAL"
>malloc(0)</TT
> and
      <TT
CLASS="LITERAL"
>realloc(NULL, 0)</TT
> (Tom Lane)
     </P
><P
>      On platforms where these calls return <TT
CLASS="LITERAL"
>NULL</TT
>, some code
      mistakenly thought that meant out-of-memory.
      This is known to have broken <SPAN
CLASS="APPLICATION"
>pg_dump</SPAN
> for databases
      containing no user-defined aggregates.  There might be other cases
      as well.
     </P
></LI
><LI
><P
>      Ensure that <TT
CLASS="LITERAL"
>make