Adafruit_MQTT.cpp:264:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

[flavio-fernandes]

• Arduino board:

ESP8266

platform = espressif8266
board = esp12e
framework = arduino

• Arduino IDE version (found in Arduino -> About Arduino menu):

PlatformIO, version 4.3.4
Using Adafruit MQTT Library version 1.3.0

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too):

Using platform.io, compile project that uses Adafruit_MQTT_Library

...
Compiling .pio/build/esp12e/lib2f0/ESP8266WiFi/BearSSLHelpers.cpp.o
/Users/ff/.platformio/lib/Adafruit MQTT Library/Adafruit_MQTT.cpp: In member function 'uint16_t Adafruit_MQTT::readFullPacket(uint8_t*, uint16_t, uint16_t)':
/Users/ff/.platformio/lib/Adafruit MQTT Library/Adafruit_MQTT.cpp:264:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (value > (maxsize - (pbuff - buffer) - 1)) {
                                              ^
Archiving .pio/build/esp12e/lib16c/libAdafruit Unified Sensor.a
...

Reference project where I see this: https://github.com/flavio-fernandes/iotMqttAttic

[mpoettgen]

Same problem here. Created a pull request.