correction memcpy pour le cas ou dst et src sont nuls

srcs/ft_calloc.c

@@ -0,0 +1,33 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_calloc.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: hulamy <marvin@42.fr>                      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/25 13:54:53 by hulamy            #+#    #+#             */
+/*   Updated: 2019/11/25 14:28:35 by hulamy           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+/*
+**	exemple allocation for 5 integers with malloc then calloc :
+**	a = (int *)malloc(5 * sizeof(int));	//5*4bytes = 20 bytes
+**	free(a);
+**	a = (int *)calloc(5, sizeof(int));
+**
+**	allocate count * size byte of memory and
+**	return a pointer to the allocated memory
+*/
+
+#include "libft.h"
+
+void	*ft_calloc(size_t count, size_t size)
+{
+	void	*tmp;
+
+	if (!count || !size || !(tmp = malloc(count * size)))
+		return (NULL);
+	ft_bzero(tmp, count * size);
+	return (tmp);
+}