monitor: s/read()/lxc_read_nointr()/g

src/lxc/monitor.c

@@ -348,7 +348,7 @@ int lxc_monitord_spawn(const char *lxcpath)
 		 * synced with the child process. the if-empty-statement
 		 * construct is to quiet the warn-unused-result warning.
 		 */
-		if (read(pipefd[0], &c, 1))
+		if (lxc_read_nointr(pipefd[0], &c, 1))
 			;
 
 		close(pipefd[0]);