Make MD consistent

include/data_obs_vector.hpp

@@ -30,7 +30,9 @@ class data_obs_vector : public data_obs
   /** Standard Construtor */
   public:
 
-  data_obs_vector(double MD=-99999, int Nsupp=2);
+	//TODO Maybe there is a better way to initialize MD with the
+	//     standard value in data_obs
+  data_obs_vector(double MD=99999, int Nsupp=2);
   data_obs_vector(int Nsupp);
   data_obs_vector(data_obs_vector* data);