* subversion/libsvn_subr/config.c    (svn_config_get): Fallback to default value if the expansion finds     nothing.  This makes my 'svnadmin create' stop SEGFAULTing.
* subversion/libsvn_subr/config.c 
  (svn_config_get): Fallback to default value if the expansion finds
    nothing.  This makes my 'svnadmin create' stop SEGFAULTing.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@845521 13f79535-47bb-0310-9956-ffa450edef68

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