Add _BSD_SOURCE for endian.h

Thanks Heiko ("rundstutzen") for reporting this!

1 files changed, 1 insertions, 0 deletions

diff --git a/png2ff.c b/png2ff.c
index 3a4329d..e567276 100644
--- a/png2ff.c
+++ b/png2ff.c
@@ -1,4 +1,5 @@
 /* See LICENSE file for copyright and license details. */
+#define _BSD_SOURCE
 #include <endian.h>
 #include <stdint.h>
 #include <stdio.h>