$OpenBSD$

fix abort(), when there was an error with iconv_open getting a conversion descriptor

--- sope-core/NGExtensions/FdExt.subproj/NSString+Encoding.m.orig	Tue Nov  2 15:12:13 2010
+++ sope-core/NGExtensions/FdExt.subproj/NSString+Encoding.m	Fri Dec 10 19:58:24 2010
@@ -256,7 +256,7 @@ static char *iconv_wrapper(id self, char *_src, unsign
   return outbuf;
   
  CLEAR_AND_RETURN:
-  if (type)
+  if (type && (type != (iconv_t)-1))
     iconv_close(type);
   
   if (outbuf) {