Use API calls for print_stats()

src/print_stats.c

@@ -43,10 +43,10 @@ void print_stats(allocator_t *allocator) {
                 (int) allocator->heaps[i].dmm_stats.num_malloc);
         printf("dmmlib - Total free() calls: %d\n",
                 (int) allocator->heaps[i].dmm_stats.num_free);
-        printf("dmmlib - Memory currently used: %d\n",
-                (int) allocator->heaps[i].dmm_stats.mem_used);
-        printf("dmmlib - Memory currently allocated: %d\n",
-                (int) allocator->heaps[i].dmm_stats.mem_allocated);
+        printf("dmmlib - Memory currently used: %zu\n",
+                get_used_space(&allocator->heaps[i]));
+        printf("dmmlib - Memory currently allocated: %zu\n",
+                get_allocated_space(&allocator->heaps[i]));
 #ifdef FUTURE_FEATURES
         printf("dmmlib - Memory currently requested: %d\n",
                 (int) allocator->heaps[i].dmm_stats.mem_requested);