lavu/file: include unistd.h only when available

The unistd.h header is only needed for the close() declaration.
If this header is not available, the close() declaration may be
provided by another header, e.g. io.h.

Signed-off-by: Mans Rullgard <mans@mansr.com>

diff --git a/libavutil/file.c b/libavutil/file.c
index 77aaca0..e1d0831 100644 (file)
--- a/libavutil/file.c
+++ b/libavutil/file.c
@@ -20,7 +20,9 @@
 #include "log.h"
 #include <fcntl.h>
 #include <sys/stat.h>
+#if HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #if HAVE_MMAP
 #include <sys/mman.h>
 #elif HAVE_MAPVIEWOFFILE