Function calloc

src/fl/stl/malloc.cpp.hpp:17–24

    }

    void* calloc(size_t nmemb, size_t size) {
        size_t total_size = nmemb * size;
        void* ptr = malloc(total_size);
        if (ptr != nullptr) {
            memset(ptr, 0, total_size);
        }
        return ptr;
    }

    void* realloc(void* ptr, size_t new_size) {
        return ::realloc(ptr, new_size);