Apply suggestion from @pcanal

Co-authored-by: Philippe Canal <pcanal@fnal.gov>

Author: ktf

DataFormats/Detectors/TPC/src/VectorPadflagsCustomStreamer.cxx

@@ -40,11 +40,10 @@ void VectorPadFlagsStreamer(TBuffer& R__b, void* objp)
 
 #define RootStreamerLocal(name,STREAMER)                                 \
 namespace ROOT {                                                         \
+   
    /** \cond HIDDEN_SYMBOLS */                                           \
-   TGenericClassInfo *GenerateInitInstanceLocal(const name*); /** \endcond */ \
-   /** \cond HIDDEN_SYMBOLS */                                           \
-   static Short_t _R__UNIQUE_(R__dummyStreamer) =                        \
-           GenerateInitInstanceLocal((name*)0x0)->SetStreamer(STREAMER);      \
+   static auto _R__UNIQUE_(R__dummyStreamer) =                        \
+           TClass::GetClass<name>()->SetStreamerFunc(STREAMER);      \
    /** \endcond */                                                       \
    R__UseDummy(_R__UNIQUE_(R__dummyStreamer));                           \
 }