Fix typo where two footprint warning messages were transposed.

Fixes https://gitlab.com/kicad/code/kicad/issues/5303

common/rc_item.cpp

@@ -278,8 +278,8 @@ void RC_TREE_MODEL::GetValue( wxVariant&              aVariant,
                               wxDataViewItem const&   aItem,
                               unsigned int            aCol ) const
 {
-    const RC_TREE_NODE* node = ToNode( aItem );
-    const std::shared_ptr<RC_ITEM>      rcItem = node->m_RcItem;
+    const RC_TREE_NODE*            node = ToNode( aItem );
+    const std::shared_ptr<RC_ITEM> rcItem = node->m_RcItem;
 
     switch( node->m_Type )
     {

pcbnew/drc/drc_item.cpp

@@ -230,8 +230,8 @@ std::shared_ptr<DRC_ITEM> DRC_ITEM::Create( int aErrorCode )
     case DRCE_NPTH_IN_COURTYARD:        return std::make_shared<DRC_ITEM>( npthInsideCourtyard );
     case DRCE_DISABLED_LAYER_ITEM:      return std::make_shared<DRC_ITEM>( itemOnDisabledLayer );
     case DRCE_INVALID_OUTLINE:          return std::make_shared<DRC_ITEM>( invalidOutline );
-    case DRCE_MISSING_FOOTPRINT:        return std::make_shared<DRC_ITEM>( duplicateFootprints );
-    case DRCE_DUPLICATE_FOOTPRINT:      return std::make_shared<DRC_ITEM>( missingFootprint );
+    case DRCE_MISSING_FOOTPRINT:        return std::make_shared<DRC_ITEM>( missingFootprint );
+    case DRCE_DUPLICATE_FOOTPRINT:      return std::make_shared<DRC_ITEM>( duplicateFootprints );
     case DRCE_EXTRA_FOOTPRINT:          return std::make_shared<DRC_ITEM>( extraFootprint );
     case DRCE_UNRESOLVED_VARIABLE:      return std::make_shared<DRC_ITEM>( unresolvedVariable );