Fix the svn_checksum_to_cstring() docstring to actually say what  was intended. Also, make clear that the behavior is new for 1.7 and  trying to use it in 1.6 will cause segfaults.
Fix the svn_checksum_to_cstring() docstring to actually say what 
was intended. Also, make clear that the behavior is new for 1.7 and 
trying to use it in 1.6 will cause segfaults.

* subversion/include/svn_checksum.h
  (svn_checksum_to_cstring): fix docstring

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1041230 13f79535-47bb-0310-9956-ffa450edef68

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