asterisk: Band aid for a crash on RTP RTCP message

This might be a general TLS issue with Asterisk on ARM. I have not
looked into why this is happening. Create a band-aid.

Crash:
(gdb) bt
it crashed when formating/printing the &addr in the rtcp recv method
...

RTCP:
Packet generated from Ekiga 3.2.7 (Debian Unstable).

Cause:
Not very clear, maybe something with TLS handling of asterisk
diff --git a/recipes-isdn/asterisk/asterisk_1.8.8.1.bb b/recipes-isdn/asterisk/asterisk_1.8.8.1.bb
index 869de25..f31ae33 100644
--- a/recipes-isdn/asterisk/asterisk_1.8.8.1.bb
+++ b/recipes-isdn/asterisk/asterisk_1.8.8.1.bb
@@ -1,5 +1,5 @@
 # Copyright (C) 2007-2008, Stelios Koroneos - Digital OPSiS, All Rights Reserved
-# Copyright (C) 2011, sysmocom - systems for mobile communications GmbH
+# Copyright (C) 2011-2012, sysmocom - systems for mobile communications GmbH
 # Released under the MIT license (see packages/COPYING)
 DESCRITOPN = "asterisk PBX"
 DEPENDS = "openssl ncurses"
@@ -7,11 +7,12 @@
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=3c6764ffcbe996d1d8f919b393ccdd67"
 
-PR = "r3"
+PR = "r4"
 
 SRC_URI = "http://downloads.asterisk.org/pub/telephony/asterisk/releases/asterisk-${PV}.tar.gz \
            file://modules.conf            \
-           file://asterisk.init           "
+           file://asterisk.init           \
+           file://stop-crash.patch        "
 
 SRC_URI[md5sum] = "783b2da2036745edeea8885c62bbc8bf"
 SRC_URI[sha256sum] = "ed98204f6261e1362c673e595823c668ae39b9833daec9127a4936cf9f4890e1"