Reuse ft_isdigit and ft_strchr from libft

libftprintf/Makefile

@@ -6,7 +6,7 @@
 #    By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2022/01/18 15:11:16 by gbaconni          #+#    #+#              #
-#    Updated: 2022/04/26 19:15:34 by gbaconni         ###   lausanne.ch        #
+#    Updated: 2022/04/29 08:39:34 by gbaconni         ###   lausanne.ch        #
 #                                                                              #
 # **************************************************************************** #
 #
@@ -29,6 +29,8 @@ SRC = \
 	  $(LIBFT)/ft_bzero.c \
 	  $(LIBFT)/ft_calloc.c \
 	  $(LIBFT)/ft_strlen.c \
+	  $(LIBFT)/ft_strchr.c \
+	  $(LIBFT)/ft_isdigit.c \
 	  $(LIBFT)/ft_itoa.c \
 	  ft_eoflags.c \
 	  ft_skipchars.c \