fix error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]

src/constraint_container.h

@@ -22,7 +22,7 @@ class ConstraintContainer: public ConstraintSparse<3,2,1,2,1>
 			lmk_ptr_(_lmk_ptr),
 			corner_(_corner)
 		{
-            assert(_corner >= 0 && _corner <= 3 && "Wrong corner id in constraint container constructor");
+            assert(/*_corner >= 0 &&*/ _corner <= 3 && "Wrong corner id in constraint container constructor");
             setType("CONTAINER");
 
             std::cout << "new constraint container: corner idx = " << corner_ << std::endl;

src/landmark_container.cpp

@@ -181,7 +181,7 @@ Eigen::MatrixXs LandmarkContainer::getCorners() const
 
 Eigen::VectorXs LandmarkContainer::getCorner(const unsigned int _id) const
 {
-    assert(_id >= 0 && _id <= 4 && "wrong corner id parameter in getCorner(id)");
+    assert(/*_id >= 0 &&*/ _id <= 4 && "wrong corner id parameter in getCorner(id)");
     return corners_.col(_id);
 }