pjproject_bundled: Crash on pj_ssl_get_info() while ioqueue_on_read_complete().

When the Asterisk channel driver res_pjsip offers SIP-over-TLS, sometimes, not
reproducible, Asterisk crashed in pj_ssl_sock_get_info() because a NULL pointer
was read. This change avoids this crash.

ASTERISK-26927 #close

Change-Id: I24a6011b44d1426d159742ff4421cf806a52938b

third-party/pjproject/patches/0048-r5576-svn-backport-tls-crash.patch

@@ -0,0 +1,32 @@
+Index: /pjproject/trunk/pjlib/src/pj/ssl_sock_ossl.c
+===================================================================
+--- a/pjlib/src/pj/ssl_sock_ossl.c	(revision 5564)
++++ b/pjlib/src/pj/ssl_sock_ossl.c	(revision 5565)
+@@ -145,5 +145,6 @@
+     SSL_STATE_NULL,
+     SSL_STATE_HANDSHAKING,
+-    SSL_STATE_ESTABLISHED
++    SSL_STATE_ESTABLISHED,
++    SSL_STATE_ERROR
+ };
+ 
+@@ -1907,4 +1908,8 @@
+ 			buf->len += size_;
+     		
++                    if (status != PJ_SUCCESS) {
++                        ssock->ssl_state = SSL_STATE_ERROR;
++                    }
++
+ 		    ret = (*ssock->param.cb.on_data_read)(ssock, buf->data,
+ 							  buf->len, status,
+@@ -2658,5 +2663,9 @@
+ 	/* Current cipher */
+ 	cipher = SSL_get_current_cipher(ssock->ossl_ssl);
+-	info->cipher = (SSL_CIPHER_get_id(cipher) & 0x00FFFFFF);
++	if (cipher) {
++	    info->cipher = (SSL_CIPHER_get_id(cipher) & 0x00FFFFFF);
++	} else {
++	    info->cipher = PJ_TLS_UNKNOWN_CIPHER;
++	}
+ 
+ 	/* Remote address */