--- orig/TraceToolkit-0.9.5/Visualizer/MainWindow.c	2002-04-15 19:23:49.000000000 -0700
+++ TraceToolkit-0.9.5/Visualizer/MainWindow.c	2006-04-05 16:04:47.000000000 -0700
@@ -28,6 +28,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <stdlib.h>
 #include <sys/stat.h>
 #include <gdk/gdkkeysyms.h>
 
@@ -3146,8 +3147,10 @@
 
   /* FORCEFULLY disconnect event handlers from the notebook widget */
   /*  I didn't find any cleaner way to do this. K.Y. 9/5/2000 */
-  GTK_SIGNAL_FUNC(GTK_WIDGET_CLASS(GTK_OBJECT(pmSysView->Window->MNotebook)->klass)->key_press_event) = NULL,
-  GTK_SIGNAL_FUNC(GTK_WIDGET_CLASS(GTK_OBJECT(pmSysView->Window->MNotebook)->klass)->focus_in_event) = NULL,
+  gtk_type_free(GTK_TYPE_SIGNAL, 
+		GTK_SIGNAL_FUNC(GTK_WIDGET_CLASS(GTK_OBJECT(pmSysView->Window->MNotebook)->klass)->key_press_event));
+  gtk_type_free(GTK_TYPE_SIGNAL,
+		GTK_SIGNAL_FUNC(GTK_WIDGET_CLASS(GTK_OBJECT(pmSysView->Window->MNotebook)->klass)->focus_in_event));
 
   /* Connect the key press event */
   gtk_signal_connect(GTK_OBJECT(pmSysView->Window->MWindow),