Add GPL boilerplate; fix dangling instance pointer after

Splash is deleted.


git-svn-id: svn://localhost/ardour2/branches/3.0@12532 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/splash.cc

@@ -1,3 +1,22 @@
+/*
+    Copyright (C) 2008 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
 #include <string>
 
 #include "pbd/failed_constructor.h"
@@ -20,6 +39,8 @@ Splash* Splash::the_splash = 0;
 
 Splash::Splash ()
 {
+	assert (the_splash = 0);
+	
 	sys::path splash_file;
 
 	if (!find_file_in_search_path (ardour_data_search_path(), "splash.png", splash_file)) {
@@ -59,6 +80,11 @@ Splash::Splash ()
 	ARDOUR::BootMessage.connect (msg_connection, invalidator (*this), boost::bind (&Splash::boot_message, this, _1), gui_context());
 }
 
+Splash::~Splash ()
+{
+	the_splash = 0;
+}
+
 void
 Splash::pop_back_for (Gtk::Window& win)
 {

gtk2_ardour/splash.h

@@ -34,7 +34,7 @@ class Splash : public Gtk::Window
 {
   public:
 	Splash ();
-	~Splash () {}
+	~Splash ();
 
 	static Splash* instance() { return the_splash; }