[gnome-builder] clang: sync buffer before completion request

[Christian Hergert <chergert src gnome org>]

commit df6b90c2c037b4f6b70ad5b76a43df9e6a118f96
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 11 01:08:52 2018 -0700

    clang: sync buffer before completion request

 src/plugins/clang/ide-clang-proposals.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/plugins/clang/ide-clang-proposals.c b/src/plugins/clang/ide-clang-proposals.c
index 2b734399d..8cb47221b 100644
--- a/src/plugins/clang/ide-clang-proposals.c
+++ b/src/plugins/clang/ide-clang-proposals.c
@@ -692,6 +692,7 @@ ide_clang_proposals_populate_async (IdeClangProposals   *self,
 
 query_client:
 
+  ide_buffer_sync_to_unsaved_files (IDE_BUFFER (buffer));
   file = ide_buffer_get_file (IDE_BUFFER (buffer));
 
   prev_cancellable = g_steal_pointer (&self->cancellable);