Typo in a comment in set_rel_size()

Hi,

Attached fixes what I suppose is a typo:

         * so set up a single dummy path for it.  Here we only check this for
         * regular baserels; if it's an otherrel, CE was already checked in
-        * set_append_rel_pathlist().
+        * set_append_rel_size().
         *

Thanks,
Amit