Heapsort for any type of elements doesn't work

The task was to write heapsort for unknown type of elements in array (using only C code), but my code doesn't work. FOr the following numbers output is '-100 7 -4 0 33 -3 67 1 5 44' I also tried to use the same code for int input only and it worked perfectly. So I think the problem is in changing it to any type of input.

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <memory.h>
typedef int typeEl;
int compare(const void* a, const void* b)
{

    return (*(typeEl*)a - *(typeEl*)b);
}
void swap(void* a, void* b, size_t sizeOfElem) {
    void* tmp = calloc(1,sizeOfElem);
    memcpy(tmp, a, sizeOfElem);
    memcpy(a, b, sizeOfElem);
    memcpy(b, tmp, sizeOfElem);
} 
void heapify (int pos, int n, void* arr, size_t sizeOfElem, int (*comp)(const void* c, const void* d)) { 
    while (2 * pos + 1 < n) {

        int t = 2 * pos +1;
        if (2 * pos + 2 < n && ((char *)arr + (2*pos+2)*sizeOfElem) >= ((char *)arr + t*sizeOfElem))
        {
            t = 2 * pos + 2;
        }
        if (comp((void *) ((char *)arr + pos*sizeOfElem), ((char *)arr + t*sizeOfElem))<0) {
            swap((void *) ((char *)arr + pos*sizeOfElem), (void *) ((char *)arr + t*sizeOfElem), sizeOfElem);
            pos = t;
        } 
        else break;

    }
}

void heap_make(int n, void* arr, size_t sizeOfElem)
{
    for (int i = n - 1; i >= 0; i--)
    {
        heapify(i, n, arr, sizeOfElem, compare );
    }
}

void heap_sort(int n, void* arr, size_t sizeOfElem)
{
    heap_make(n, arr, sizeOfElem);
    while(n>0)
    {
        swap((void *) ((char *)arr), (void *) ((char *)arr + (n-1)*sizeOfElem), sizeOfElem);;
        n--;
        heapify(0,n, arr, sizeOfElem, compare);
    }
}


 int main() {
   int n;
   int m[10] = {1,-3,5,-100,7,33,44,67,-4, 0};

   heap_sort(10, m, sizeof(int));

   for (n=0; n<10; n++)
        printf ("%d ",m[n]);

   return 0;
}

Anyone can advise? Thx for the help!