Minor efficiency tweak.
Minor efficiency tweak.

* subversion/libsvn_subr/utf.c
  (svn_utf_cstring_to_utf8, svn_utf_cstring_from_utf8,
  svn_utf_cstring_from_utf8_stringbuf, svn_utf_cstring_from_utf8_string):
  Use apr_pstrmemdup instead of apr_pstrdup/apr_pstrndup.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@842513 13f79535-47bb-0310-9956-ffa450edef68

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