Factor out some repeated code in loading a repository dump stream.
Factor out some repeated code in loading a repository dump stream.

* subversion/libsvn_repos/load.c
  (read_key_or_val): New function extracted from parse_property_block().
  (parse_property_block): Use it.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@858185 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,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion