Fix two bugs in log message compatibility code.
Fix two bugs in log message compatibility code.

Patch by: Martin Hauner <martin.hauner@gmx.net>

* subversion/libsvn_client/commit_util.c
  (svn_client__get_log_msg): Construct array using pointer size, not
    object size.  Pass the right parameter in a function call. 


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@872018 13f79535-47bb-0310-9956-ffa450edef68

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