Always set POLLOUT on slave poll

ttynvt.c

@@ -955,13 +955,15 @@ ttynvt_poll(fuse_req_t req, struct fuse_file_info *info,
             struct fuse_pollhandle *ph)
 {
     ttynvt_t       *tty = (ttynvt_t *) (uintptr_t) info->fh;
-    int             revents = 0;
+    int             revents;
 
     DBG2("%s: tty->pollin=%d tty->error/epipe=%d/%d\n",
          __func__, tty->pollin, tty->error, tty->epipe);
 
     _update_notify(tty, ph);
 
+    revents = POLLOUT;
+
     if (tty->pollin)
     {
         tty->pollin = 0;
@@ -970,7 +972,7 @@ ttynvt_poll(fuse_req_t req, struct fuse_file_info *info,
     if (tty->error)
     {
         if (tty->epipe == 0)
-            revents = POLLHUP | POLLIN;
+            revents |= POLLHUP | POLLIN;
         else
             revents = 0;
     }