make this work again, and not segfault on device registration

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@135332 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_skinny.c

@@ -4166,7 +4166,7 @@ static int handle_keep_alive_message(struct skinny_req *req, struct skinnysessio
 
 static int handle_register_message(struct skinny_req *req, struct skinnysession *s)
 {
-	struct skinny_device *d = s->device;
+	struct skinny_device *d = NULL;
 	char name[16];
 	int res;
 
@@ -4184,6 +4184,8 @@ static int handle_register_message(struct skinny_req *req, struct skinnysession
 		return 0;
 	}
 	ast_verb(3, "Device '%s' successfully registered\n", name);
+
+	d = s->device;
 	
 	if (!(req = req_alloc(sizeof(struct register_ack_message), REGISTER_ACK_MESSAGE)))
 		return -1;