Follow-up to r1533816:  We have two nested loops and cleaning the iterpool in the inner one will destroy the ENTRIES varible of the outer loop.
Follow-up to r1533816:  We have two nested loops and cleaning the
iterpool in the inner one will destroy the ENTRIES varible of the
outer loop.

* subversion/libsvn_fs_fs/pack.c
  (pack_range): use independent pools for the nested loops

git-svn-id: ffff46c2915712c3f53fa52a6edff6337513e032@1534138 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion