Fix compilation warning

src/lxc/lxc_checkpoint.c

@@ -36,6 +36,7 @@
 
 #include "arguments.h"
 #include "config.h"
+#include "caps.h"
 
 lxc_log_define(lxc_checkpoint_ui, lxc_checkpoint);
 

src/lxc/lxc_restart.c

@@ -31,6 +31,7 @@
 
 #include "log.h"
 #include "lxc.h"
+#include "caps.h"
 #include "conf.h"
 #include "config.h"
 #include "confile.h"

src/lxc/utmp.c

@@ -294,13 +294,16 @@ static int utmp_shutdown_handler(int fd, void *data,
 				 struct lxc_epoll_descr *descr)
 {
 	int ntasks;
+	ssize_t nread;
 	struct lxc_utmp *utmp_data = (struct lxc_utmp *)data;
 	struct lxc_handler *handler = utmp_data->handler;
 	struct lxc_conf *conf = handler->conf;
 	uint64_t expirations;
 
 	/* read and clear notifications */
-	read(fd, &expirations, sizeof(expirations));
+	nread = read(fd, &expirations, sizeof(expirations));
+	if (nread < 0)
+		SYSERROR("Failed to read timer notification");
 
 	ntasks = utmp_get_ntasks(handler);