[glom] Remove more unnecessary null checks before delete

[Murray Cumming <murrayc src gnome org>]

commit d687b82bf45e8461bac0d6bc996a2ed08058d6b7
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Dec 16 14:28:54 2010 +0100

    Remove more unnecessary null checks before delete

 glom/mode_data/box_data_calendar_related.cc       |    3 +--
 glom/mode_design/fields/dialog_fielddefinition.cc |    7 ++-----
 2 files changed, 3 insertions(+), 7 deletions(-)
---
diff --git a/glom/mode_data/box_data_calendar_related.cc b/glom/mode_data/box_data_calendar_related.cc
index 09fc4ec..0d31405 100644
--- a/glom/mode_data/box_data_calendar_related.cc
+++ b/glom/mode_data/box_data_calendar_related.cc
@@ -240,8 +240,7 @@ void Box_Data_Calendar_Related::clear_cached_database_values()
     for(type_list_vectors::iterator iter = vec.begin(); iter != vec.end(); ++iter)
     {
       type_vector_values* pValues = *iter;
-      if(pValues)
-        delete pValues;
+      delete pValues;
     }
   }
 
diff --git a/glom/mode_design/fields/dialog_fielddefinition.cc b/glom/mode_design/fields/dialog_fielddefinition.cc
index 0cb4714..76c9ee6 100644
--- a/glom/mode_design/fields/dialog_fielddefinition.cc
+++ b/glom/mode_design/fields/dialog_fielddefinition.cc
@@ -146,11 +146,8 @@ void Dialog_FieldDefinition::set_field(const sharedptr<const Field>& field, cons
     default_value = m_Field->get_default_value();
 
   //Create an appropriate DataWidget for the default value:
-  if(m_pDataWidget_DefaultValueSimple)
-  {
-    delete m_pDataWidget_DefaultValueSimple;
-    m_pDataWidget_DefaultValueSimple = 0;
-  }
+  delete m_pDataWidget_DefaultValueSimple;
+  m_pDataWidget_DefaultValueSimple = 0;
 
   //We use a regular DataWidget for the default value, so we can reuse its functionality,
   //but it's not a real field - hence the special title.