Moved the module_nh to protected in order to be used by inherited classes.

include/iri_ros_tools/module.h

@@ -18,12 +18,13 @@
 template<class ModuleCfg>
 class CModule
 {
+  protected:
+    /* internal node handle */
+    ros::NodeHandle module_nh;
   private:
     std::string name;
     ros::Rate module_rate;
     CMutex module_access;
-    /* internal node handle */
-    ros::NodeHandle module_nh;
     /* reconfiguer attributes */
     dynamic_reconfigure::Server<ModuleCfg> dyn_reconf;
     /* thread attributes */