Use calloc() instead of malloc()+memset()

src/core.c

@@ -88,12 +88,11 @@ int allocate_memory(block **memory, uint32_t m_cost) {
  return ARGON2_MEMORY_ALLOCATION_ERROR;
  }
 
- *memory = (block *)malloc(memory_size); /*2. Try to allocate*/
+ *memory = (block *)calloc(memory_size, 1); /*2. Try to allocate*/
 
  if (!*memory) {
  return ARGON2_MEMORY_ALLOCATION_ERROR;
  }
- memset(*memory,0, memory_size);
  return ARGON2_OK;
  } else {
  return ARGON2_MEMORY_ALLOCATION_ERROR;