Save memory, use unsigned int instead of size_t for ids.
Save memory, use unsigned int instead of size_t for ids.

The number of call stacks should hopefully fit into that range.

muojp/heaptrack,muojp/heaptrack,muojp/heaptrack,stormspirit/heaptrack,muojp/heaptrack,muojp/heaptrack,stormspirit/heaptrack,stormspirit/heaptrack