Update ArduinoOTA.cpp

Author: lrmoreno007

libraries/ArduinoOTA/ArduinoOTA.cpp

@@ -146,7 +146,7 @@ int ArduinoOTAClass::parseInt(){
   uint8_t index;
   char value;
   while(_udp_ota->peek() == ' ') _udp_ota->read();
-  for(index = 0; index < sizeof(data); index++){
+  for(index = 0; index < sizeof(data); ++index){
     value = _udp_ota->peek();
     if(value < '0' || value > '9'){
       data[index++] = '\0';
@@ -159,13 +159,13 @@ int ArduinoOTAClass::parseInt(){
 
 String ArduinoOTAClass::readStringUntil(char end){
   String res = "";
-  char value;
+  int value;
   while(true){
     value = _udp_ota->read();
-    if(value < '0' || value == '\0' || value == end){
+    if(value < 0 || value == '\0' || value == end){
       return res;
     }
-    res += value;
+    res += static_cast<char>(value);
   }
   return res;
 }