replace wrong calls to cbuf->size in UDP

Author: me-no-dev

libraries/WiFi/src/WiFiUdp.cpp

@@ -205,13 +205,13 @@ int WiFiUDP::parsePacket(){
 
 int WiFiUDP::available(){
  if(!rx_buffer) return 0;
- return rx_buffer->size();
+ return rx_buffer->available();
 }
 
 int WiFiUDP::read(){
  if(!rx_buffer) return -1;
  int out = rx_buffer->read();
- if(!rx_buffer->size()){
+ if(!rx_buffer->available()){
  cbuf *b = rx_buffer;
  rx_buffer = 0;
  delete b;
@@ -226,7 +226,7 @@ int WiFiUDP::read(unsigned char* buffer, size_t len){
 int WiFiUDP::read(char* buffer, size_t len){
  if(!rx_buffer) return 0;
  int out = rx_buffer->read(buffer, len);
- if(!rx_buffer->size()){
+ if(!rx_buffer->available()){
  cbuf *b = rx_buffer;
  rx_buffer = 0;
  delete b;