Fix (possible) memory corruption bug. The txstream's resulting checksum was allocated in an iteration pool rather than the requested result pool.
Fix (possible) memory corruption bug. The txstream's resulting checksum
was allocated in an iteration pool rather than the requested result pool.

* subversion/libsvn_delta/text_delta.c:
  (txdelta_next_window): allocate the checksum from b->result_pool


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@873687 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion