SW-227: Cleaner code for generating the feedback version number.

RTCP/Cobalt/CoInterface/src/LTAFeedback.h

@@ -63,8 +63,8 @@ namespace LOFAR
       static const int major_version = 3;
       static const int minor_version = 1;
       static const int patch_number = 0;
-      std::string feedback_version = (boost::format("%02d.%02d.%02d") %
-                                        major_version % minor_version % patch_number).str();
+      static const std::string feedback_version(boost::str(boost::format("%02d.%02d.%02d") %
+                                        major_version % minor_version % patch_number)));
 
     private:
       const ObservationSettings settings;