Include assert.h in necessary place

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

netutils/ftpd/ftpd.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * apps/netutils/ftpd.c
+ * apps/netutils/ftpd/ftpd.c
  *
  *   Copyright (C) 2012, 2015, 2020 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
@@ -58,6 +58,7 @@
 #include <fcntl.h>
 #include <poll.h>
 #include <libgen.h>
+#include <assert.h>
 #include <errno.h>
 #include <debug.h>
 

netutils/webserver/httpd.c

@@ -56,6 +56,7 @@
 #include <strings.h>
 #include <unistd.h>
 #include <string.h>
+#include <assert.h>
 #include <errno.h>
 #include <debug.h>
 

netutils/webserver/httpd_dirlist.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * netutils/webserver/httpd_dirlist.c
+ * apps/netutils/webserver/httpd_dirlist.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
@@ -32,6 +32,7 @@
 #include <fcntl.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <assert.h>
 #include <errno.h>
 #include <debug.h>
 #include <string.h>

wireless/gs2200m/gs2200m_main.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * apps/wireless/gs2200m_main.c
+ * apps/wireless/gs2200m/gs2200m_main.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
@@ -29,6 +29,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <assert.h>
 #include <debug.h>
 #include <fcntl.h>
 #include <errno.h>