Add missing #include <assert.h> fro Libretiny support

Author: mathieucarbou

examples/AsyncSend/AsyncSend.ino

@@ -38,6 +38,7 @@ Buffer received - next send in 2 sec
 #include <AsyncTCP.h>
 #include <StreamString.h>
 #include <WiFi.h>
+#include <assert.h>
 
 #include <functional>
 #include <string>

platformio.ini

@@ -30,6 +30,15 @@ platform = https://github.com/pioarduino/platform-espressif32/releases/download/
 [env:arduino-3-latest]
 platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.20-rc2/platform-espressif32.zip
 
+[env:arduino-libretiny]
+platform = libretiny
+board = generic-bk7231n-qfn32-tuya
+build_flags =
+  ${env.build_flags}
+  -Wno-unused-parameter
+  -Wno-unused-variable
+  -Wno-missing-field-initializers
+
 ;  CI
 
 [env:ci-arduino-2]

src/AsyncTCP.cpp

@@ -37,6 +37,8 @@ static unsigned long millis() {
 #define CONFIG_ASYNC_TCP_USE_WDT 0
 #endif
 
+#include <assert.h>
+
 extern "C" {
 #include "lwip/dns.h"
 #include "lwip/err.h"