Bugfix in resolvconf file manipulation

src/andna_cache.c

@@ -2046,10 +2046,11 @@ add_resolv_conf(char *hname, char *file)
 
   reread_fin:
 	fseek(fin, 0, SEEK_END);
-	buf_sz = ftell(fin);
+	buf_sz = ftell(fin)+1;
 	rewind(fin);
 
 	buf = xmalloc(buf_sz);
+	memset(buf, 0, buf_sz);
 	if (!fread(buf, buf_sz, 1, fin)) {
 		error("add_resolv_conf: it wasn't possible to read the %s file",
 			  file);