core: add missing namespace

include/eiquadprog/eiquadprog-utils.hxx

@@ -4,6 +4,8 @@
 #include <Eigen/Core>
 #include <iostream>
 
+namespace eiquadprog {
+
 /// Compute sqrt(a^2 + b^2)
 template <typename Scalar> inline Scalar distance(Scalar a, Scalar b) {
   Scalar a1, b1, t;
@@ -28,4 +30,6 @@ void print_matrix(const char *name, Eigen::MatrixBase<Derived> &x, int n) {
   std::cerr << name << std::endl << x << std::endl;
 }
 
+} // namespace eiquadprog
+
 #endif