replaced occurrences of last exit_status

+ deleted envp comments
+ WIP Macro exit status
+ TODO : Invalid free of environ in readline

srcs/builtins/export.c

@@ -1,7 +1,7 @@
 
 #include "minishell.h"
 
-int	getenv_position(char **envp, char *name)
+int	getenv_position(char **envp, char *name) // TODO : virer arg envp et utiliser "extern **environ" à la place
 {
 	int	i;
 
@@ -26,7 +26,7 @@ int	builtin_export(int argc, char *argv[], t_all *c)
 		environ = ft_resize_2d_arr(environ, 1);
 	environ[env_position] = ft_strdup(argv[1]);
 	if (!ft_strncmp(var[0], "PATH", 4 + 1))
-		c->path = retrieve_path(environ);
+		c->path = retrieve_path();
 	// free var
 	return (0);
 }