Fix various compiler warnings.
Fix various compiler warnings.

* subversion/libsvn_fs_fs/temp_serializer.c
  (return_serialized_dir_context): mark as "static"
  (svn_fs_fs__extract_dir_entry, svn_fs_fs__replace_dir_entry):
   rename "index" to "pos" as index is obviously declared in some header

Found by: philipm

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1094689 13f79535-47bb-0310-9956-ffa450edef68

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