ipc: Fix uninitialized ptr xfree-ing

  CC       ipc_ns.o
  ipc_ns.c: In function ‘dump_ipc_msg’:
  ipc_ns.c:240:2: error: ‘message’ may be used uninitialized in this function [-Werror=uninitialized]
  ipc_ns.c:192:17: note: ‘message’ was declared here
  cc1: all warnings being treated as errors
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

ipc_ns.c

@@ -189,7 +189,7 @@ static void pr_info_ipc_msg_entry(const IpcMsgEntry *msg)
 static int dump_ipc_msg_queue_messages(int fd, const IpcMsgEntry *entry,
 				       unsigned int msg_nr)
 {
-	struct msgbuf *message;
+	struct msgbuf *message = NULL;
 	unsigned int msgmax;
 	int ret, msg_cnt = 0;
 	struct sysctl_req req[] = {