Pass CFX_WideString further down widget callers

fpdfsdk/formfiller/cffl_iformfiller.cpp

Index: fpdfsdk/formfiller/cffl_iformfiller.cpp
diff --git a/fpdfsdk/formfiller/cffl_iformfiller.cpp b/fpdfsdk/formfiller/cffl_iformfiller.cpp
index db1f538e9d8b6f5b7f292b959dc17b02c694d5a2..24a6122f62e8c08bb995c9a8c998ce458172c671 100644
--- a/fpdfsdk/formfiller/cffl_iformfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_iformfiller.cpp
@@ -724,8 +724,7 @@ void CFFL_IFormFiller::OnFormat(CPDFSDK_Widget* pWidget,
       return;
 
     if (bFormatted) {
-      pInterForm->ResetFieldAppearance(pWidget->GetFormField(), sValue.c_str(),
-                                       TRUE);
+      pInterForm->ResetFieldAppearance(pWidget->GetFormField(), &sValue, TRUE);
       pInterForm->UpdateField(pWidget->GetFormField());
     }