readd and fix instantiation of setProperty

PhysicsAnalysis/ElectronPhotonID/PhotonVertexSelection/PhotonVertexSelection/PhotonVertexSelectionDict.h

@@ -23,4 +23,20 @@ namespace {
   };
 }
 
+#ifdef XAOD_STANDALONE
+
+// Helper macro for declaring the setProperty functions to the dictionary:
+#define SETPROPERTY_INSTAN( TYPE )                                            \
+   template StatusCode asg::AsgComponent::setProperty< TYPE >( const std::string&, \
+                                                               const TYPE& )
+
+// Declare all possible setProperty template instantiations to Reflex:
+SETPROPERTY_INSTAN( ToolHandle<CP::IPhotonPointingTool > );
+
+// Make the compiler forget about this macro now...
+#undef SETPROPERTY_INSTAN
+
+#endif // XAOD_STANDALONE
+
+
 #endif // PhotonVertexSelection_PhotonVertexSelectionDict_H