[gnome-builder] code-index: add trace message for debugging

[Christian Hergert <chergert src gnome org>]

commit 82cf4efcba854fbed64ec4b47c3630ea5ac350d3
Author: Christian Hergert <chergert redhat com>
Date:   Sun Mar 25 17:23:21 2018 -0700

    code-index: add trace message for debugging

 src/plugins/code-index/ide-code-index-builder.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/plugins/code-index/ide-code-index-builder.c b/src/plugins/code-index/ide-code-index-builder.c
index ce4f3ea72..3d808942a 100644
--- a/src/plugins/code-index/ide-code-index-builder.c
+++ b/src/plugins/code-index/ide-code-index-builder.c
@@ -825,6 +825,7 @@ add_entries_to_index (GPtrArray               *entries,
   gchar num[16];
 
   g_assert (IDE_IS_MAIN_THREAD ());
+  g_assert (entries != NULL);
   g_assert (G_IS_FILE (file));
   g_assert (file_id > 0);
   g_assert (IDE_IS_PERSISTENT_MAP_BUILDER (map_builder));
@@ -842,6 +843,8 @@ add_entries_to_index (GPtrArray               *entries,
   dzl_fuzzy_index_builder_set_metadata_uint32 (fuzzy_builder, filename, file_id);
   dzl_fuzzy_index_builder_set_metadata_string (fuzzy_builder, num, filename);
 
+  IDE_TRACE_MSG ("Adding %u entries for %s", entries->len, filename);
+
   for (guint i = 0; i < entries->len; i++)
     {
       IdeCodeIndexEntry *entry = g_ptr_array_index (entries, i);