made compile

--HG--
branch : HEAD
diff --git a/lib/zip_fclose.c b/lib/zip_fclose.c
index 2bddffd..444e680 100644
--- a/lib/zip_fclose.c
+++ b/lib/zip_fclose.c
@@ -1,3 +1,5 @@
+#include <stdlib.h>
+
 #include "zip.h"
 #include "zipint.h"