compiles

--HG--
branch : HEAD
diff --git a/lib/zip_unchange_data.c b/lib/zip_unchange_data.c
index 8e6247c..98d0841 100644
--- a/lib/zip_unchange_data.c
+++ b/lib/zip_unchange_data.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include "zip.h"
 #include "zipint.h"