The reason we were seeing leaf pages during our review/cleanup of the
newly created child pages was because the for loop was wrong, it should
have been "i = pindex->entries - SPLIT_CORRECT_2", that is, we should
ignore the first and last entries in the new parent page.  Remove any
adjustment of the for loop and process all of the parent page entries,
it's no slower and will avoid bugs if we ever change our policy on what
pages are left untouched in the parent.

Reference 63dd6b2.