fix corner 2D

@joanvallve can you please check this PR ?

src/processor_tracker_landmark_corner.cpp

@@ -64,7 +64,7 @@ unsigned int ProcessorTrackerLandmarkCorner::findLandmarks(const LandmarkBaseLis
         Scalar closest_dm2 = 1e3;
         for (auto landmark_it = not_matched_landmarks.begin(); landmark_it != not_matched_landmarks.end(); landmark_it++)
         {
-            if ((*landmark_it)->getType() == "CORNER" &&
+            if ((*landmark_it)->getType() == "CORNER 2D" &&
                 fabs(pi2pi((std::static_pointer_cast<FeatureCorner2D>(*feature_it))->getAperture() - (*landmark_it)->getDescriptor(0))) < aperture_error_th_)
             {
                 dm2 = computeSquaredMahalanobisDistances((*feature_it), expected_features[*landmark_it],