fix compiler warnings by including ac/unistd.h

diff --git a/libraries/libldap_r/threads.c b/libraries/libldap_r/threads.c
index 3ac48498e7ac9c44f96473d357efc03e7b68cca4..e14fdb1e2c47f6ce1945c630c0fef811b1d569ce 100644 (file)
--- a/libraries/libldap_r/threads.c
+++ b/libraries/libldap_r/threads.c
@@ -16,6 +16,7 @@
 
 #include <ac/stdlib.h>
 #include <ac/string.h>
+#include <ac/unistd.h>
 
 #include "ldap_pvt_thread.h"