Support dovecot 2.3

Untested but it builds now properly. Thanks to "smorks" for the report!

Fixes #16

Signed-off-by: David Goulet <dgoulet@ev0ke.net>

src/trees-istream.c

@@ -431,5 +431,9 @@ trees_istream_create(struct istream *input,
   sstream->out_byte_count = 0;
 #endif
 
+#if DOVECOT_PREREQ(2, 3)
+	return i_stream_create(&sstream->istream, input, i_stream_get_fd(input), 0);
+#else
   return i_stream_create(&sstream->istream, input, i_stream_get_fd(input));
+#endif /* DOVECOT_PREREQ */
 }

src/trees-ostream.c

@@ -174,7 +174,14 @@ trees_ostream_sendv(struct ostream_private *stream,
 static int
 trees_ostream_flush(struct ostream_private *stream)
 {
+  /* This is pretty ugly but unfortunately between 2.2 and 2.3, Dovecot changed
+   * the expected value to be non zero in 2.3+ . */
+#if DOVECOT_PREREQ(2, 3)
+  ssize_t result = 1;
+#else
   ssize_t result = 0;
+#endif /* DOVECOT_PREREQ */
+
   struct trees_ostream *sstream = (struct trees_ostream *) stream;
 
   if (sstream->flushed) {