[gnome-builder] plugins/clang: always set icon for completion result

[Christian Hergert <chergert src gnome org>]

commit c2a104fb03f8518a1cde3a4f300d57c999afc614
Author: Christian Hergert <chergert redhat com>
Date:   Fri Sep 2 23:48:35 2022 -0700

    plugins/clang: always set icon for completion result
    
    We can use fallback "C" source icon.

 src/plugins/clang/ide-clang-completion-item.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/src/plugins/clang/ide-clang-completion-item.c b/src/plugins/clang/ide-clang-completion-item.c
index 8d50d4a3f..6fcbd224e 100644
--- a/src/plugins/clang/ide-clang-completion-item.c
+++ b/src/plugins/clang/ide-clang-completion-item.c
@@ -505,7 +505,11 @@ ide_clang_completion_item_display (IdeClangCompletionItem  *self,
   switch (column)
     {
     case GTK_SOURCE_COMPLETION_COLUMN_ICON:
-      gtk_source_completion_cell_set_icon_name (cell, self->icon_name);
+      if (self->icon_name)
+        gtk_source_completion_cell_set_icon_name (cell, self->icon_name);
+      else
+        gtk_source_completion_cell_set_icon_name (cell, "text-x-csrc-symbolic");
+
       break;
 
     case GTK_SOURCE_COMPLETION_COLUMN_TYPED_TEXT: