Fix warnings

src/draco/core/bounding_box.cc

@@ -27,7 +27,7 @@ BoundingBox::BoundingBox()
 BoundingBox::BoundingBox(const Vector3f &min_point, const Vector3f &max_point)
     : min_point_(min_point), max_point_(max_point) {}
 
-const bool BoundingBox::IsValid() const {
+bool BoundingBox::IsValid() const {
   return GetMinPoint()[0] != std::numeric_limits<float>::max() &&
          GetMinPoint()[1] != std::numeric_limits<float>::max() &&
          GetMinPoint()[2] != std::numeric_limits<float>::max() &&

src/draco/core/bounding_box.h

@@ -41,7 +41,7 @@ class BoundingBox {
   // Checks if the bounding box object was created with the default constructor
   // then never updated. Internally, checks if the bounding box minimum and
   // maximum points hold the largest positive and smallest negative values.
-  const bool IsValid() const;
+  bool IsValid() const;
 
   // Conditionally updates the bounding box with a given |new_point|.
   void Update(const Vector3f &new_point) {

src/draco/core/draco_index_type.h

@@ -67,6 +67,7 @@ class IndexType {
   typedef ValueTypeT ValueType;
 
   constexpr IndexType() : value_(ValueTypeT()) {}
+  constexpr IndexType(const IndexType &i) : value_(i.value_) {}
   constexpr explicit IndexType(ValueTypeT value) : value_(value) {}
 
   constexpr ValueTypeT value() const { return value_; }