Eeschema: Add bit that was missing from commit 7ac83ac6

This part of the check removes recursive sheets from the schematic when
loading and notifies the user that their schematic has been repaired.

eeschema/sch_sheet_path.cpp

@@ -373,6 +373,8 @@ void SCH_SHEET_LIST::BuildSheetList( SCH_SHEET* aSheet )
 {
     wxCHECK_RET( aSheet != NULL, wxT( "Cannot build sheet list from undefined sheet." ) );
 
+    std::vector<SCH_SHEET*> badSheets;
+
     if( aSheet == g_RootSheet )
         m_isRootSheet = true;
 
@@ -389,7 +391,21 @@ void SCH_SHEET_LIST::BuildSheetList( SCH_SHEET* aSheet )
     if( m_currentSheetPath.LastScreen() )
     {
         for( auto item : m_currentSheetPath.LastScreen()->Items().OfType( SCH_SHEET_T ) )
-            BuildSheetList( static_cast<SCH_SHEET*>( item ) );
+        {
+            auto sheet = static_cast<SCH_SHEET*>( item );
+
+            if( !m_currentSheetPath.TestForRecursion(
+                        sheet->GetFileName(), aSheet->GetFileName() ) )
+                BuildSheetList( sheet );
+            else
+                badSheets.push_back( sheet );
+        }
+    }
+
+    for( auto sheet : badSheets )
+    {
+        m_currentSheetPath.LastScreen()->Remove( sheet );
+        m_currentSheetPath.LastScreen()->SetModify();
     }
 
     m_currentSheetPath.pop_back();