Fix loopfiles to not call function() on file not found.
diff --git a/lib/lib.c b/lib/lib.c
index 6699a68..cea3e4b 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -600,6 +600,7 @@
 		else if (0>(fd = open(*argv, O_RDONLY))) {
 			perror_msg("%s",*argv);
 			toys.exitval = 1;
+			continue;
 		}
 		function(fd, *argv);
 		close(fd);