fix errors found with make_single_applets.sh

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libbb/bb_cat.c

@@ -0,0 +1,33 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//kbuild:lib-y += bb_cat.o
+
+#include "libbb.h"
+
+int FAST_FUNC bb_cat(char **argv)
+{
+	int fd;
+	int retval = EXIT_SUCCESS;
+
+	if (!*argv)
+		argv = (char**) &bb_argv_dash;
+
+	do {
+		fd = open_or_warn_stdin(*argv);
+		if (fd >= 0) {
+			/* This is not a xfunc - never exits */
+			off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
+			if (fd != STDIN_FILENO)
+				close(fd);
+			if (r >= 0)
+				continue;
+		}
+		retval = EXIT_FAILURE;
+	} while (*++argv);
+
+	return retval;
+}