more precise using PIIODevice::reading_now flag, Warning! one should use it manually now

small enum fix for pip_cmg

libs/main/io_devices/piiodevice.cpp

@@ -270,9 +270,7 @@ void PIIODevice::stop() {
 
 
 ssize_t PIIODevice::read(void * read_to, ssize_t max_size) {
-	reading_now = true;
 	ssize_t ret = readDevice(read_to, max_size);
-	reading_now = false;
 	return ret;
 }
 
@@ -285,9 +283,7 @@ ssize_t PIIODevice::read(PIMemoryBlock mb) {
 PIByteArray PIIODevice::read(ssize_t max_size) {
 	if (max_size <= 0) return PIByteArray();
 	buffer_in.resize(max_size);
-	reading_now = true;
 	ssize_t ret = readDevice(buffer_in.data(), max_size);
-	reading_now = false;
 	if (ret < 0) return PIByteArray();
 	return buffer_in.resized(ret);
 }