Check XmppStream against null

Most of the calls to stream_interactor.get_stream(account) were already
doing null checks, but there were still some missing.

1 files changed, 8 insertions, 1 deletions

diff --git a/libdino/src/service/history_sync.vala b/libdino/src/service/history_sync.vala
index d883fd79..ef7c65e6 100644
--- a/libdino/src/service/history_sync.vala
+++ b/libdino/src/service/history_sync.vala
@@ -366,7 +366,10 @@ public class Dino.HistorySync {
      * prev_page_result: null if this is the first page request
      **/
     private async PageRequestResult get_mam_page(Account account, Xmpp.MessageArchiveManagement.V2.MamQueryParams query_params, PageRequestResult? prev_page_result, Cancellable? cancellable = null) {
-        XmppStream stream = stream_interactor.get_stream(account);
+        XmppStream? stream = stream_interactor.get_stream(account);
+        if (stream == null) {
+            return new PageRequestResult.with_result(PageResult.Error);
+        }
         Xmpp.MessageArchiveManagement.QueryResult query_result = null;
         if (prev_page_result == null) {
             query_result = yield Xmpp.MessageArchiveManagement.V2.query_archive(stream, query_params, cancellable);
@@ -592,5 +595,9 @@ public class Dino.HistorySync {
             this.query_result = query_result;
             this.stanzas = stanzas;
         }
+
+        public PageRequestResult.with_result(PageResult page_result) {
+            this.page_result = page_result;
+        }
     }
 }