lib-compress: ostream-zlib - Make sure finished stream is fully flushed

diff --git a/src/lib-compression/ostream-zlib.c b/src/lib-compression/ostream-zlib.c
index 67584d46679e9f81e3e8abe9acd745bcd39d11f6..306655544c3b4b146809c5edf85ffe62414ba736 100644 (file)
--- a/src/lib-compression/ostream-zlib.c
+++ b/src/lib-compression/ostream-zlib.c
@@ -176,7 +176,7 @@ o_stream_zlib_send_flush(struct zlib_ostream *zstream, bool final)
        i_assert(zs->avail_in == 0);
 
        if (zstream->flushed)
-               return 0;
+               return 1;
 
        if ((ret = o_stream_flush_parent_if_needed(&zstream->ostream)) <= 0)
                return ret;