fix [#28672] Blender segfault after exiting a game that was opened with

autoplay on (Blender, not blenderplayer)

blender now stops the sound system and free's its self on Pythons
sys.exit().

source/blender/python/intern/bpy_interface_atexit.c

@@ -0,0 +1,76 @@
+/*
+ * $Id:
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contributor(s): Campbell Barton
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/python/intern/bpy_interface_atexit.c
+ *  \ingroup pythonintern
+ */
+
+
+#include <Python.h>
+
+#include "bpy_util.h"
+
+#include "WM_api.h"
+
+#include "BLI_utildefines.h"
+
+static PyObject *bpy_atexit(PyObject *UNUSED(self), PyObject *UNUSED(args), PyObject *UNUSED(kw))
+{
+	/* close down enough of blender at least not to crash */
+	struct bContext *C= BPy_GetContext();
+
+	WM_exit_ext(C, 0);
+
+	Py_RETURN_NONE;
+}
+
+static PyMethodDef meth_bpy_atexit= {"bpy_atexit", (PyCFunction)bpy_atexit, METH_NOARGS, NULL};
+
+void BPY_atexit_init(void)
+{
+	/* note - no error checking, if any of these fail we'll get a crash
+	 * this is intended, but if its problematic it could be changed
+	 * - campbell */
+
+	PyObject *atexit_mod= PyImport_ImportModuleLevel((char *)"atexit", NULL, NULL, NULL, 0);
+	PyObject *atexit_register= PyObject_GetAttrString(atexit_mod, "register");
+	PyObject *args= PyTuple_New(1);
+	PyObject *ret;
+
+	PyTuple_SET_ITEM(args, 0, (PyObject *)PyCFunction_New(&meth_bpy_atexit, NULL));
+
+	ret= PyObject_CallObject(atexit_register, args);
+
+	Py_DECREF(atexit_mod);
+	Py_DECREF(atexit_register);
+	Py_DECREF(args);
+
+	if(ret) {
+		Py_DECREF(ret);
+	}
+	else { /* should never happen */
+		PyErr_Print();
+	}
+
+}