AccessRecorder does not increment maxHeapAlloc correctly in leaky code

[ahueck]

Currently, maxHeapAlloc is only incremented when a free heap operation triggers in a target code.

Hence, in a code without free, the max heap is incorrectly printed:

int main(void) {
  for (int i = 1; i <= 6; ++i) {
    // 6 heap alloc, max heap (concurrently) 6
    double* d = (double*)malloc(sizeof(double));
  }
  return 0;
}

-> Prints: Max. Heap Allocs 0 but expeced is 6.

Fix

AccessRecorder calculates max. for every heap allocation "just in time", instead of waiting for a free.