Inflict PDF_ENABLE_XFA ifdefs on XFA fpdfsdk/

fpdfsdk/src/javascript/JS_Runtime_Stub.cpp

Index: fpdfsdk/src/javascript/JS_Runtime_Stub.cpp
diff --git a/fpdfsdk/src/javascript/JS_Runtime_Stub.cpp b/fpdfsdk/src/javascript/JS_Runtime_Stub.cpp
index 90d19d94517d673ae9d30966b7e5b3372ee5ecc1..b53806619054a6913e14db4dbe35aa2fb5aeb592 100644
--- a/fpdfsdk/src/javascript/JS_Runtime_Stub.cpp
+++ b/fpdfsdk/src/javascript/JS_Runtime_Stub.cpp
@@ -136,6 +136,7 @@ class CJS_RuntimeStub final : public IJS_Runtime {
   }
   CPDFSDK_Document* GetReaderDocument() override { return m_pDoc; }
 
+#ifdef PDF_ENABLE_XFA
   virtual FX_BOOL GetHValueByName(const CFX_ByteStringC&,
                                   FXJSE_HVALUE) override {
     return FALSE;
@@ -146,6 +147,7 @@ class CJS_RuntimeStub final : public IJS_Runtime {
     return FALSE;
   }
 
+#endif
   int Execute(IJS_Context* cc,
               const wchar_t* script,
               CFX_WideString* info) override {