setlocale() sets errno to ENOENT ...

open("/usr/lib/locale/de_DE.UTF-8/LC_NUMERIC", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
open("/usr/lib/locale/de_DE.utf8/LC_NUMERIC", O_RDONLY|O_CLOEXEC) = 3

and this causes a problem later on (bsc#908516)

---
 free.c |    5 +++++
 1 file changed, 5 insertions(+)

--- free.c
+++ free.c	2015-09-18 12:38:22.565518967 +0000
@@ -205,6 +205,7 @@ int main(int argc, char **argv)
 	int c, flags = 0, unit_set = 0;
 	char *endptr;
 	struct commandline_arguments args;
+	int errsv;
 
 	/*
 	 * For long options that have no equivalent short option, use a
@@ -255,10 +256,12 @@ int main(int argc, char **argv)
 #ifdef HAVE_PROGRAM_INVOCATION_NAME
 	program_invocation_name = program_invocation_short_name;
 #endif
+	errsv = errno;
 	setlocale (LC_ALL, "");
 	bindtextdomain(PACKAGE, LOCALEDIR);
 	textdomain(PACKAGE);
 	atexit(close_stdout);
+	errno = errsv;
 
 	while ((c = getopt_long(argc, argv, "bkmghltCc:ws:V", longopts, NULL)) != -1)
 		switch (c) {
@@ -325,6 +328,7 @@ int main(int argc, char **argv)
 			break;
 		case 's':
 			flags |= FREE_REPEAT;
+			errsv = errno;
 			errno = 0;
 			args.repeat_interval = (1000000 * strtof(optarg, &endptr));
 			if (errno || optarg == endptr || (endptr && *endptr))
@@ -332,6 +336,7 @@ int main(int argc, char **argv)
 			if (args.repeat_interval < 1)
 				xerrx(EXIT_FAILURE,
 				     _("seconds argument `%s' is not positive number"), optarg);
+			errno = errsv;
 			break;
 		case 'c':
 			flags |= FREE_REPEAT;