master 8a2dbf9f86: Fix pselect usage mistakes

[Po Lu]

branch: master
commit 8a2dbf9f86f0c79c0e5c5c528ddcb6a5e3d89c00
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix pselect usage mistakes
    
    * src/xterm.c (x_next_event_from_any_display):
    (x_wait_for_cell_change): Fix calls to pselect and tests against
    return value.
---
 src/xterm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/xterm.c b/src/xterm.c
index f062e6485d..2421108a41 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -10322,7 +10322,7 @@ x_next_event_from_any_display (XEvent *event)
       /* We don't have to check the return of pselect, because if an
         error occurs XPending will call the IO error handler, which
         then brings us out of this loop.  */
-      pselect (maxfd, &fds, NULL, NULL, NULL, NULL);
+      pselect (maxfd + 1, &fds, NULL, NULL, NULL, NULL);
     }
 }
 
@@ -14945,12 +14945,12 @@ x_wait_for_cell_change (Lisp_Object cell, struct 
timespec timeout)
       timeout = timespec_sub (at, current);
 
 #ifndef USE_GTK
-      rc = pselect (maxfd, &fds, NULL, NULL, &timeout, NULL);
+      rc = pselect (maxfd + 1, &fds, NULL, NULL, &timeout, NULL);
 
-      if (rc > 0)
+      if (rc >= 0)
        rfds = fds;
 #else
-      pselect (maxfd, &fds, NULL, NULL, &timeout, NULL);
+      pselect (maxfd + 1, &fds, NULL, NULL, &timeout, NULL);
 #endif
     }
 }