Patch to enable running on amd64 (borrowed from http://bugs.debian.org/366580)

--- a/src/convert.c
+++ b/src/convert.c
@@ -98,8 +98,9 @@
 
   char *inbuf  = (char*) src;
   char *outbuf = param->dst;
-  int  inbytesleft  = src_len - 1;
-  int  outbytesleft = param->dst_len - 1;
+  /* iconv requires size_t and not int ! */
+  size_t  inbytesleft  = src_len - 1;
+  size_t  outbytesleft = param->dst_len - 1;
   bzero(param->dst, param->dst_len);
   // Need some error handling here
   iconv(param->cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);