ittnotify increment & decrement API seems broken

[nagorny]

For the following sample value changing events are skipped. It's very sad as README claims that counters are supported.

#include "ittnotify.h"

__itt_counter temperatureCounter = __itt_counter_create("Temperature", "Domain");
__itt_counter memoryUsageCounter = __itt_counter_create("Memory Usage", "Domain");
unsigned __int64 temperature;

while (...)
{
    ...
    temperature = getTemperature();
    __itt_counter_set_value(temperatureCounter, &temperature);

    __itt_counter_inc_delta(memoryUsageCounter, getAllocatedMemSize());
    __itt_counter_dec_delta(memoryUsageCounter, getDeallocatedMemSize());
    ...
}

__itt_counter_destroy(temperatureCounter);
__itt_counter_destroy(memoryUsageCounter);