From: Steven Tamm <steventamm@mac.com>
Date: Mon, 20 Jan 2003 16:53:38 +0000 (+0000)
Subject: * macterm.c (XTread_socket): Checks for valid, visible window
X-Git-Tag: ttn-vms-21-2-B4~11562
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=539e69a9fd648d083c27aa5afd5d70d60cfae1ca;p=emacs.git

* macterm.c (XTread_socket): Checks for valid, visible window
	before sending a scroll-wheel event.
---

diff --git a/src/ChangeLog b/src/ChangeLog
index 3f0eb5db6a9..c110217d1e6 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2003-01-20  Steven Tamm  <steventamm@mac.com>
+
+	* macterm.c (XTread_socket): Checks for valid, visible window
+	before sending a scroll-wheel event.
+
 2003-01-20  Richard M. Stallman  <rms@gnu.org>
 
 	* xdisp.c (redisplay_window): If mini window's buffer is not
diff --git a/src/macterm.c b/src/macterm.c
index cae4172854e..e969a4b6dce 100644
--- a/src/macterm.c
+++ b/src/macterm.c
@@ -12644,6 +12644,13 @@ XTread_socket (int sd, struct input_event *bufp, int numchars, int expected)
 		Point point;
 		WindowPtr window_ptr = FrontNonFloatingWindow ();
 		struct mac_output *mwp = (mac_output *) GetWRefCon (window_ptr);
+		if (!IsValidWindowPtr (window_ptr))
+		  {
+		    SysBeep(1);
+		    UNBLOCK_INPUT;
+		    return 0;
+		  }
+
 		GetEventParameter(eventRef, kEventParamMouseWheelDelta,
 				  typeSInt32, NULL, sizeof (SInt32),
 				  NULL, &delta);