Fix warning in MSVC

Author: cschreib

tests/memory_tracker.cpp

@@ -41,14 +41,14 @@ void scramble(void* ptr, std::size_t size) {
 void* allocate(std::size_t size, bool array, std::align_val_t align) {
  if (memory_tracking && num_allocations == max_allocations) {
  if constexpr (debug_alloc) {
- std::printf("alloc %ld failed\n", size);
+ std::printf("alloc %zu failed\n", size);
  }
  throw std::bad_alloc();
  }
 
  if (force_next_allocation_failure) {
  if constexpr (debug_alloc) {
- std::printf("alloc %ld failed\n", size);
+ std::printf("alloc %zu failed\n", size);
  }
  force_next_allocation_failure = false;
  throw std::bad_alloc();
@@ -69,13 +69,13 @@ void* allocate(std::size_t size, bool array, std::align_val_t align) {
 
  if (!p) {
  if constexpr (debug_alloc) {
- std::printf("alloc %ld failed\n", size);
+ std::printf("alloc %zu failed\n", size);
  }
  throw std::bad_alloc();
  }
 
  if constexpr (debug_alloc) {
- std::printf("alloc %ld -> %p\n", size, p);
+ std::printf("alloc %zu -> %p\n", size, p);
  }
 
  if constexpr (scramble_alloc) {