Make code compile with clang_use_chrome_plugin (part VI)

xfa/fwl/lightwidget/cfwl_listbox.cpp

Index: xfa/fwl/lightwidget/cfwl_listbox.cpp
diff --git a/xfa/fwl/lightwidget/cfwl_listbox.cpp b/xfa/fwl/lightwidget/cfwl_listbox.cpp
index d51db44f3b96669ce299a6a0b7a41c83497389ed..be6a6b12497d2b1703fefb2814c083b0152ad296 100644
--- a/xfa/fwl/lightwidget/cfwl_listbox.cpp
+++ b/xfa/fwl/lightwidget/cfwl_listbox.cpp
@@ -341,3 +341,15 @@ FWL_Error CFWL_ListBox::CFWL_ListBoxDP::SetItemCheckState(
   static_cast<CFWL_ListItem*>(pItem)->m_dwCheckState = dwCheckState;
   return FWL_Error::Succeeded;
 }
+
+CFWL_ListItem::CFWL_ListItem() {
+  m_rtItem.Reset();
+  m_dwStates = 0;
+  m_wsText = L"";
+  m_pDIB = NULL;
+  m_pData = NULL;
+  m_dwCheckState = 0;
+  m_rtCheckBox.Reset();
+}
+
+CFWL_ListItem::~CFWL_ListItem() {}