[glom] Fix tiny typo in error output.

[Murray Cumming <murrayc src gnome org>]

commit 15d2b2abc5b9c4f758e2f1eddea8b94bc79bfa63
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Nov 3 21:27:53 2015 +0100

    Fix tiny typo in error output.

 glom/mode_data/datawidget/cellrenderer_dblist.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/glom/mode_data/datawidget/cellrenderer_dblist.cc 
b/glom/mode_data/datawidget/cellrenderer_dblist.cc
index 0acff96..e65f6ec 100644
--- a/glom/mode_data/datawidget/cellrenderer_dblist.cc
+++ b/glom/mode_data/datawidget/cellrenderer_dblist.cc
@@ -195,7 +195,7 @@ void CellRendererDbList::repack_cells_related(Gtk::CellLayout* combobox)
       cell = create_cell(layout_item, m_table_name, m_document, get_fixed_cell_height(*widget));
       if(!cell)
       {
-        std::cerr << G_STRFUNC << ": create_cell() return 0." << std::endl;
+        std::cerr << G_STRFUNC << ": create_cell() returned 0." << std::endl;
       }
       else
       {