Remove pad from struct input_event.

* termhooks.h (struct input_event): Remove padding field.
Adjust comment.
* keyboard.c (event_to_kboard): Simplify because frame_or_window
member is never cons for a long time.  Adjust comment.
(mark_kboards): Adjust because SELECTION_REQUEST_EVENT and
SELECTION_CLEAR_EVENT has no Lisp_Objects to mark.  Add comment.
* xterm.c (handle_one_xevent): Do not initialize frame_or_window
field of SELECTION_REQUEST_EVENT and SELECTION_CLEAR_EVENT.

1 files changed, 2 insertions, 10 deletions

diff --git a/src/termhooks.h b/src/termhooks.h
index c33c2dd1587..2d97fcdbc1e 100644
--- a/src/termhooks.h
+++ b/src/termhooks.h
@@ -242,16 +242,8 @@ struct input_event
   Lisp_Object x, y;
   Time timestamp;
 
-  /* This is padding just to put the frame_or_window field
-     past the size of struct selection_input_event.  */
-  int *padding[2];
-
-  /* This field is copied into a vector while the event is in the queue,
-     so that garbage collections won't kill it.  */
-  /* In a menu_bar_event, this is a cons cell whose car is the frame
-     and whose cdr is the Lisp object that is the event's value.  */
-  /* This field is last so that struct selection_input_event
-     does not overlap with it.  */
+  /* This field is copied into a vector while the event is in
+     the queue, so that garbage collections won't kill it.  */
   Lisp_Object frame_or_window;
 
   /* Additional event argument.  This is used for TOOL_BAR_EVENTs and