Compiling error In member function 'byte MFRC522::PCD_ReadRegister(byte)': warning: ISO C++ says that these are ambiguous ...

[paolovr970]

Compiling a sketch and using MFRC522_I2C_library the Arduino IDE reports this message (non blocking but present).
Can you fix it?
thanks. p.

c:\Users...\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp: In member function 'byte MFRC522::PCD_ReadRegister(byte)':
c:\Users...Arduino\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp:83:51: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second: [enabled by default]
_TwoWireInstance->requestFrom(_chipAddress, _size);
^
In file included from c:\Users...\Arduino\libraries\MFRC522_I2C_Library-master\src/MFRC522_I2C.h:82:0,
from c:\Users...\Arduino\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp:10:
C:\Users...\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.12\libraries\Wire\src/Wire.h:50:10: note: candidate 1: uint8_t TwoWire::requestFrom(int, int)
uint8_t requestFrom(int, int);
^
C:\Users...\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.12\libraries\Wire\src/Wire.h:47:10: note: candidate 2: uint8_t TwoWire::requestFrom(uint8_t, uint8_t)
uint8_t requestFrom(uint8_t, uint8_t);
^
c:\Users...\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp: In member function 'void MFRC522::PCD_ReadRegister(byte, byte, byte*, byte)':
c:\Users...\Arduino\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp:106:52: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second: [enabled by default]
_TwoWireInstance->requestFrom(_chipAddress, _count);
^
In file included from c:\Users....\Arduino\libraries\MFRC522_I2C_Library-master\src/MFRC522_I2C.h:82:0,
from c:\Users...\Arduino\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp:10:
C:\Users...\Arduino15\packages\arduino\hardware\sam\1.6.12\libraries\Wire\src/Wire.h:50:10: note: candidate 1: uint8_t TwoWire::requestFrom(int, int)
uint8_t requestFrom(int, int);
^
C:\Users...\Arduino15\packages\arduino\hardware\sam\1.6.12\libraries\Wire\src/Wire.h:47:10: note: candidate 2: uint8_t TwoWire::requestFrom(uint8_t, uint8_t)
uint8_t requestFrom(uint8_t, uint8_t);
^
c:\Users...\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp: In member function 'byte MFRC522::PCD_CommunicateWithPICC(byte, byte, byte*, byte, byte*, byte*, byte*, byte, bool)':
c:\Users...\Arduino\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp:458:20: warning: '_validBits' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (backLen < 2 || _validBits != 0) {
^
c:\Users...\Arduino\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp: In member function 'void MFRC522::PICC_DumpMifareClassicSectorToSerial(MFRC522::Uid, MFRC522::MIFARE_Key*, byte)':
c:\Users...\Arduino\libraries\MFRC522_I2C_Library-master\src\MFRC522_I2C.cpp:1478:4: warning: 'invertedError' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (invertedError) {
^