istream-concat: Fixed a memory leak.

diff --git a/src/lib/istream-concat.c b/src/lib/istream-concat.c
index 39a2cc6873e01d8705aedbdf6e9960e4edab3ca8..ab7425770e337a6d6c2017d5d93a735fe1d75e8f 100644 (file)
--- a/src/lib/istream-concat.c
+++ b/src/lib/istream-concat.c
@@ -31,6 +31,7 @@ static void i_stream_concat_destroy(struct iostream_private *stream)
 
        for (i = 0; cstream->input[i] != NULL; i++)
                i_stream_unref(&cstream->input[i]);
+       i_free(cstream->istream.w_buffer);
 }
 
 static void