Rename _zip_free to zip_discard and make it available in the public API.
It closes zip archives without saving changes.

--HG--
branch : HEAD

lib/CMakeLists.txt

diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 9cde52d..d1cb0c3 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -58,6 +58,7 @@
   zip_close.c
   zip_delete.c
   zip_dirent.c
+  zip_discard.c
   zip_entry_free.c
   zip_entry_new.c
   zip_err_str.c
@@ -79,7 +80,6 @@
   zip_fopen_index.c
   zip_fopen_index_encrypted.c
   zip_fread.c
-  zip_free.c
   zip_get_archive_comment.c
   zip_get_archive_flag.c
   zip_get_compression_implementation.c