[Minor] Fix compilation warning.

src/dubins-path.cc

@@ -230,7 +230,7 @@ namespace hpp {
          end_.head (device_->configSize ()), l/L, q[2]);
       const int* types = DIRDATA [typeId_];
       for (std::size_t i=0; i<3; ++i) {
-        value_type curvature;
+        value_type curvature = 0;
         switch (types [i]) {
         case L_SEG:
           curvature = 1./rho_;

src/steering-method/constant-curvature.cc

@@ -274,7 +274,7 @@ namespace hpp {
           pathLength = fabs (tmax - tmin)/L * length ();
         }
         Configuration_t init (robot_->configSize ());
-        bool res (impl_compute (init, tmin)); assert (res);
+        bool res (impl_compute (init, tmin)); assert (res); (void)res;
         Configuration_t end (robot_->configSize ());
         res = impl_compute (end,tmax); assert (res);
         ConstantCurvaturePtr_t result (createCopy (weak_.lock ()));