Don't pass invalid keyboard modifiers to the event loop on Haiku

* src/haikuterm.c (haiku_read_socket): Ensure validity of extra
keyboard modifiers.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/haikuterm.c b/src/haikuterm.c
index b5b61ec85f5..c184501a207 100644
--- a/src/haikuterm.c
+++ b/src/haikuterm.c
@@ -2703,7 +2703,13 @@ haiku_read_socket (struct terminal *terminal, struct input_event *hold_quit)
 
             inev.timestamp = b->time / 1000;
             inev.modifiers = (haiku_modifiers_to_emacs (b->modifiers)
-                              | extra_keyboard_modifiers);
+                              | (extra_keyboard_modifiers
+                                 & (meta_modifier
+                                    | hyper_modifier
+                                    | ctrl_modifier
+                                    | alt_modifier
+                                    | shift_modifier)));
+
             XSETFRAME (inev.frame_or_window, f);
             break;
           }