Possible bug in plpgsql/src/gram.y

In this bit of code in src/pl/plpgsql/src/gram.y in the current CVS
sources, curname_def is defined as PLpgSQL_expr * but it is is
allocated the space required for a PLpgSQL_var.  This looks like a
bug.

Ian
            | decl_varname K_CURSOR decl_cursor_args decl_is_from K_SELECT decl_cursor_query                {
        PLpgSQL_var *new;                    PLpgSQL_expr *curname_def;                    char        buf[1024];
            char        *cp1;                    char        *cp2;
 
                    plpgsql_ns_pop();
                    new = malloc(sizeof(PLpgSQL_var));                    memset(new, 0, sizeof(PLpgSQL_var));
                    curname_def = malloc(sizeof(PLpgSQL_var));                    memset(curname_def, 0,
sizeof(PLpgSQL_var));