address the issue of duplicating discrete factors

src/DCSAM.cpp

@@ -95,7 +95,7 @@ void DCSAM::update(const gtsam::NonlinearFactorGraph &graph,
   updateContinuousInfo(currDiscrete_, combined, initialGuessContinuous);
   currContinuous_ = isam_.calculateEstimate();
   // Update discrete info from last solve and
-  updateDiscrete(discreteCombined, currContinuous_, currDiscrete_);
+  updateDiscreteInfo(currContinuous_, currDiscrete_);
 }
 
 void DCSAM::update(const HybridFactorGraph &hfg,