conf: make close_all_fds a boolean

src/lxc/conf.h

@@ -254,7 +254,7 @@ struct lxc_conf {
 	struct lxc_terminal console;
 	struct lxc_rootfs rootfs;
 	char *ttydir;
-	int close_all_fds;
+	bool close_all_fds;
 
 	struct {
 		unsigned int hooks_version;

src/lxc/tools/arguments.h

@@ -83,7 +83,7 @@ struct lxc_arguments {
 	int force;
 
 	/* close fds from parent? */
-	int close_all_fds;
+	bool close_all_fds;
 
 	/* lxc-create */
 	char *bdevtype, *configfile, *template;

src/lxc/tools/lxc_start.c

@@ -96,7 +96,7 @@ static int my_parser(struct lxc_arguments *args, int c, char *arg)
 		args->rcfile = arg;
 		break;
 	case 'C':
-		args->close_all_fds = 1;
+		args->close_all_fds = true;
 		break;
 	case 's':
 		return lxc_config_define_add(&defines, arg);