Add header file required for pread/pwrite (on my system at least).

diff --git a/ext/session/mod_files.c b/ext/session/mod_files.c
index 89b894d29b136b38b043ae826f418f9eea12384e..82727d3da13c81bd414e17649ce56c8c9b779e24 100644 (file)
--- a/ext/session/mod_files.c
+++ b/ext/session/mod_files.c
@@ -39,6 +39,10 @@
 #include <fcntl.h>
 #include <errno.h>
 
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
 #include "php_session.h"
 #include "mod_files.h"
 #include "ext/standard/flock_compat.h"