Fix stupid error in previous commit

Since ret is no longer update by close_notify(), we need to reset it to 0
after a successful write.
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 9ecbdf1..18513c9 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -1749,7 +1749,7 @@
 
     buf[written] = '\0';
     printf( " %d bytes written in %d fragments\n\n%s\n", written, frags, (char *) buf );
-
+    ret = 0;
 
     /*
      * 7b. Continue doing data exchanges?