"ignore Y" in make_lispy_event

[Eli Zaretskii <eliz@gnu.org>]

A comment in keyboard.c:make_lispy_event says:

      /* For mode line and header line clicks, return X relative to
	 the left window edge; ignore Y.  Use mode_line_string to look
	 for a string on the click position.  */

The code below that, introduced in revno 102413, indeed "ignores Y",
in that it leaves yret at its initial zero value.  This breaks mouse
clicks on the mode line that pop up menus via x-popup-menu: the menu
is popped at the top of the frame/window, instead of at the place of
the click.

Chong, did you have good reasons to "ignore Y"?  If not, the simple
patch below restores the correct behavior of the popup menus:

=== modified file 'src/keyboard.c'
--- src/keyboard.c	2010-11-20 14:51:25 +0000
+++ src/keyboard.c	2010-11-26 13:33:31 +0000
@@ -5305,6 +5305,7 @@ make_lispy_position (struct frame *f, Li
 	    ? PT : XMARKER (w->pointm)->charpos;
 
 	  xret = wx;
+	  yret = wy;
 	}
       /* For fringes and margins, Y is relative to the area's (and the
 	 window's) top edge, while X is meaningless.  */