fpdfsdk/ differences with XFA (for didactic purposes only).

fpdfsdk/src/formfiller/FFL_FormFiller.cpp

Index: fpdfsdk/src/formfiller/FFL_FormFiller.cpp
diff --git a/fpdfsdk/src/formfiller/FFL_FormFiller.cpp b/fpdfsdk/src/formfiller/FFL_FormFiller.cpp
index 31e6cd691ac1b4e9f7e2a983615e4a639b33a2c1..867bda09cc56a79190dfc4cc21fcc8b124abf9cb 100644
--- a/fpdfsdk/src/formfiller/FFL_FormFiller.cpp
+++ b/fpdfsdk/src/formfiller/FFL_FormFiller.cpp
@@ -562,6 +562,12 @@ FX_BOOL CFFL_FormFiller::IsDataChanged(CPDFSDK_PageView* pPageView) {
 
 void CFFL_FormFiller::SaveData(CPDFSDK_PageView* pPageView) {}
 
+#ifdef PDF_ENABLE_XFA
+FX_BOOL CFFL_FormFiller::IsFieldFull(CPDFSDK_PageView* pPageView) {
+  return FALSE;
+}
+
+#endif
 void CFFL_FormFiller::SetChangeMark() {
   m_pApp->FFI_OnChange();
 }