Follow-up to r37868, follow our de facto standard of returning errors from within a loop without destroying the iterpool, it will be destroyed when the error is handled.
Follow-up to r37868, follow our de facto standard of returning errors from
within a loop without destroying the iterpool, it will be destroyed when the
error is handled.

Suggested by: hwright

* subversion/libsvn_subr/hash.c:
  (hash_read): Revert to pre-r37868 behavior of simply returning errors from
  within the stream reading loop.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@878053 13f79535-47bb-0310-9956-ffa450edef68

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