#129: build: fix build, added prototype for o_stream_nfinished to avo…

…id compilation errors with dovecot >= 2.3

src/storage-rbox/rbox-save.cpp

@@ -49,6 +49,11 @@ using librmb::rbox_metadata_key;
 using std::string;
 using std::vector;
 
+#if DOVECOT_PREREQ(2, 3)
+// avoid compilation errors.
+int o_stream_nfinish(struct ostream *stream) {}
+#endif
+
 struct mail_save_context *rbox_save_alloc(struct mailbox_transaction_context *t) {
   FUNC_START();
   struct rbox_mailbox *rbox = (struct rbox_mailbox *)t->box;
@@ -395,12 +400,12 @@ int rbox_save_finish(struct mail_save_context *_ctx) {
 
     struct mail_save_data *mdata = &r_ctx->ctx.data;
     if (mdata->output != r_ctx->output_stream) {
-#if defined DOVECOT_VERSION_MAJOR == 2 && DOVECOT_VERSION_MINOR > 2
+#if DOVECOT_PREREQ(2, 3)
       /* e.g. zlib plugin had changed this. make sure we
              successfully write the trailer. */
       o_stream_finish(mdata->output);
 #endif
-#if defined DOVECOT_VERSION_MAJOR == 2 && DOVECOT_VERSION_MINOR < 3
+#if DOVECOT_PREREQ(2, 2)
       if (o_stream_nfinish(mdata->output) < 0) {
         mail_storage_set_critical(r_ctx->ctx.transaction->box->storage, "write(%s) failed: %m",
                                   o_stream_get_name(mdata->output));