algo: set protected instead of private

include/hpp/fcl/collision.h

@@ -137,6 +137,8 @@ public:
   }
   
   CollisionGeometry const *o1, *o2;
+
+protected:
   GJKSolver solver;
 
   CollisionFunctionMatrix::CollisionFunc func;

include/hpp/fcl/distance.h

@@ -128,7 +128,7 @@ public:
     return res;
   }
 
-private:
+protected:
   CollisionGeometry const *o1, *o2;
   GJKSolver solver;