[jnc_io_cmn] fix: invalid test in AsyncIoDevice::isReadBufferValid/AsyncIoDevice::isWriteBufferValid
[jnc_io_cmn] fix: invalid test in AsyncIoDevice::isReadBufferValid/AsyncIoDevice::isWriteBufferValid

vovkos/jancy,vovkos/jancy,vovkos/jancy,vovkos/jancy,vovkos/jancy