Design block: fix uninitialised variables on load

Thse were just omitted from the JSON loader, so they were
uninitialised. Valgrind doesn't like them because they get
compared to things before being set.

eeschema/eeschema_settings.cpp

@@ -650,6 +650,9 @@ EESCHEMA_SETTINGS::EESCHEMA_SETTINGS() :
     m_params.emplace_back( new PARAM<bool>( "symbol_chooser.place_all_units",
             &m_SymChooserPanel.place_all_units, true ) );
 
+    m_params.emplace_back( new PARAM<int>( "design_block_chooser.sash_pos_h",
+            &m_DesignBlockChooserPanel.sash_pos_h, -1 ) );
+
     m_params.emplace_back( new PARAM<int>( "design_block_chooser.sash_pos_v",
             &m_DesignBlockChooserPanel.sash_pos_v, -1 ) );
 
@@ -668,6 +671,9 @@ EESCHEMA_SETTINGS::EESCHEMA_SETTINGS() :
     m_params.emplace_back( new PARAM<bool>( "design_block_chooser.place_as_sheet",
             &m_DesignBlockChooserPanel.place_as_sheet, false ) );
 
+    m_params.emplace_back( new PARAM<bool>( "design_block_chooser.keep_annotations",
+            &m_DesignBlockChooserPanel.keep_annotations, false ) );
+
     m_params.emplace_back( new PARAM<bool>( "import_graphics.interactive_placement",
             &m_ImportGraphics.interactive_placement, true ) );