(svn_string_appendbytes): tack on trailing null.  Note that this takes care of svn_string_appendstr() as well, since that's just a wrapper for this.
(svn_string_appendbytes): tack on trailing null.  Note that this takes
care of svn_string_appendstr() as well, since that's just a wrapper
for this.

(svn_string_ncreate): tack on trailing null.

(svn_string_2cstring): fix math for trailing null byte.

(svn_string_fillchar): get rid of bogus safety check, since it would
hide malformed strings and thus make a bug invisible without removing
its source.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@836978 13f79535-47bb-0310-9956-ffa450edef68

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