[glom] null pointer check

[Murray Cumming <murrayc src gnome org>]

commit 5202e64b936738fb7a5096aa182287f5e38cb803
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Apr 3 02:34:58 2013 +0200

    null pointer check

 glom/dialog_existing_or_new.cc |    7 ++++++-
 glom/libglom/db_utils.cc       |   10 ++++++----
 2 files changed, 12 insertions(+), 5 deletions(-)
---
diff --git a/glom/dialog_existing_or_new.cc b/glom/dialog_existing_or_new.cc
index ddaf383..7f0c3e2 100644
--- a/glom/dialog_existing_or_new.cc
+++ b/glom/dialog_existing_or_new.cc
@@ -766,13 +766,18 @@ void Dialog_ExistingOrNew::on_service_removed(const Glib::ustring& name, const G
     if((*iter)[m_existing_columns.m_col_service_name] == name)
     {
       const bool was_expanded = m_existing_view->row_expanded(m_existing_model->get_path(iter));
+
       // Remove from store
       epc_service_info_unref((*iter)[m_existing_columns.m_col_service_info]);
       m_existing_model->erase(iter);
+
       // Reinsert dummy, if necessary
       if(children.begin() == children.end())
         m_iter_existing_network_dummy = create_dummy_item_existing(m_iter_existing_network, 
_(NETWORK_DUMMY_TEXT));
-      if(was_expanded) m_existing_view->expand_row(m_existing_model->get_path(iter), false);
+
+      if(was_expanded)
+        m_existing_view->expand_row(m_existing_model->get_path(iter), false);
+
       break;
     }
   }
diff --git a/glom/libglom/db_utils.cc b/glom/libglom/db_utils.cc
index c566c0b..f7b0508 100644
--- a/glom/libglom/db_utils.cc
+++ b/glom/libglom/db_utils.cc
@@ -1199,16 +1199,18 @@ bool create_table_with_default_fields(Document* document, const Glib::ustring& t
   table_info->set_name(table_name);
   table_info->set_title_original( Utils::title_from_string( table_name ) ); //Start with a title that might 
be appropriate.
 
+  if(!document)
+  {
+    std::cerr << G_STRFUNC << ": document was null." << std::endl;
+    return false;
+  }
+  
   created = create_table(document->get_hosting_mode(), table_info, fields);
-
   if(created)
   {
     //Save the changes in the document:
-    if(document)
-    {
       document->add_table(table_info);
       document->set_table_fields(table_info->get_name(), fields);
-    }
   }
 
   return created;