lib: istream-chain didn't update its max_buffer_size

I had this code at some point earlier, but looks like it got lost from the
final commit.

diff --git a/src/lib/istream-chain.c b/src/lib/istream-chain.c
index ddf0f566c82db5978478b43982eeee0b96bf337d..6880f8d00e2154521b429d364059ae223ae5a32b 100644 (file)
--- a/src/lib/istream-chain.c
+++ b/src/lib/istream-chain.c
@@ -51,6 +51,11 @@ i_stream_chain_append_internal(struct istream_chain *chain,
                if (cstream->have_explicit_max_buffer_size) {
                        i_stream_set_max_buffer_size(stream,
                                chain->stream->istream.max_buffer_size);
+               } else {
+                       size_t max_size = i_stream_get_max_buffer_size(stream);
+
+                       if (cstream->istream.max_buffer_size < max_size)
+                               cstream->istream.max_buffer_size = max_size;
                }
        }
        DLLIST2_APPEND(&chain->head, &chain->tail, link);