void * bson_malloc0 (size_t num_bytes);
This is a portable malloc() wrapper that also sets the memory to zero. Similar to calloc().
In general, this function will return an allocation at least sizeof(void*) bytes or bigger.
If there was a failure to allocate num_bytes bytes, the process will be aborted.
This function will abort on failure to allocate memory.
A pointer to a memory region which HAS been zeroed.